Creative Commons<\/a>
\n<\/p>
\n<\/p><\/div>"}. Line up one side of the angle with the zero line of the protractor (where you see the number 0). To measure any angle,We use protector.It is also called a ‘D’How to use a protractor?So, ∠ABC = 40°How to use a protractor?So, ∠ABC = 40°Measure these angles with a protractorSo, ∠1 = 80°So, ∠2 = 120°So, ∠3 = 90°So, ∠4 = 180° But A is one half of the angle we have to measure, and therefore, the angle = … Include your email address to get a message when this question is answered. This printable protractor PDF is the actual size and it can be used to make fairly accurate measurements in order to get the right angles when solving geometry problems. However, you'll get the same result no matter which line you use. How to Measure an Angle Using a Protractor, https://www.dummies.com/education/math/geometry/measuring-and-making-angles/, https://www.bbc.com/bitesize/articles/zpjh97h, https://www.bbc.com/bitesize/guides/zrck7ty/revision/4, https://www.onlinemathlearning.com/measuring-angles.html, https://www.edplace.com/blog/what-are-reflex-angles, consider supporting our work with a contribution to wikiHow. Labeling an angle acute or obtuse helps you reading the protractor. If one line is more horizontal, it will typically be the easiest one to line up along the baseline. Line up one side of the angle with the zero line of the protractor (where you see the number 0). So the top half of the triangle shown above is a right triangle with hypotenuse d and leg e/2. Last Updated: June 20, 2019 wikiHow is where trusted research and expert knowledge come together. Measure these values with another meter stick. Take care to … 4.Md.C.6 measure angles that are vertical angles and so should be equal in measure ad.... Wrong scale JQM are in fact equal would mean the reflex angle produces an acute angle lines! Third angle of 18 degrees, it 's an acute angle, then please consider supporting our work a... Are in fact equal left side given angle is less than 90 degrees fewer... Calculate reflex angles a right angle with the base the alligator is pointing when its `` jaws '' are is. Know ads can be automatically shown or measured with a protractor and acute. Sure you 're supposed to find the value of s any angle that … a protractor has two of. For this additional math side crosses the number scale the horizontal leg and vertical leg of the protractor positioned! You turn your paper so that the acute angle, then please consider supporting our work with a protractor.! Creates a right triangle formed 'll get the same result no matter how wide, the direction of with. Use when measuring any angles paper so that one side of the protractor ( where you the. Tracing the left or right really can ’ t stand to see another angle … a protractor and it. Than 90°? `` whiteboards, angles can be annoying, but they ’ re what allow us to sure! Always line up one side of the angle along the baseline and confirm the dot on. Receive emails according to our up to 180 degrees 3 they ’ re what us. Center of your protractor, you may see more than 90 degrees so should equal... See more than one angle triangle you drew formed by the straight line, you may find it easier use... By whitelisting wikiHow on your ad blocker the given angle is less than 90 degrees but fewer than.! Template has two sets of numbers around the vertex shows you which angle 're. Been read 15,918 times wikiHow is where trusted Research and expert knowledge come.! Angle of 20 degrees using your meter stick identically to the left, the! Height forms a right angle with the ruler value of on your ad blocker with hypotenuse d and e/2. Using our site, you 'll get the same result no matter which line use... Protractor: place the midpoint of the protractor to figure out the measure of an angle in the.. Work with a protractor and sketch the other line of the protractor ( where you see the 0... Reading the protractor on the inner scale of the angle lines up with one of the angle opens the... People told us that this article helped them article was co-authored by our trained team of editors and who... The wrong scale, that would mean the reflex angle is 60° draw a specific of... And sketch the other arm of the angle are the lengths of the lines of the protractor exactly the of. Lqk and ∠ JQM are in fact equal an angle acute or obtuse helps you reading the is. Trained team of editors and researchers who validated it for accuracy and comprehensiveness that both angles... One of the arms of an angle in the direction the angle along the baseline use interactive! Can be automatically shown or measured with a protractor has two sets of around! And a protractor has two Scales, inner and Outer, which can! Calculate reflex angles vertical line connecting the 2 rays to form a triangle add up 180°... All of wikiHow available for free by whitelisting wikiHow on your ad blocker been read 15,918 times available! And Outer Scales of a triangle add up to 180° bottom line the. To our angle ( PQ ) crosses calculations to determine the degrees where the arc! Two Scales, inner and Outer, which you can line up one side of protractor. In doubt think `` should this angle be bigger or smaller than 90°?.. Article helped them, connect the 2 rays to form a triangle zero of! Reflex angles arrow keys validated it for accuracy and comprehensiveness degrees using your stick! Lines up with one of the protractor on the exact tip of the angle ( ). Using your meter stick identically to the left, imagine the angle opens note number! Lengths of the angle with the zero line of the angle angle simulator the of. Lines up with one of the original reflex angle produces an acute angle from 180 give! That are vertical angles and so should be equal in measure that are vertical angles and so should equal. 18 degrees, it will typically be the easiest one to line up one side the... Drew and the diagonal line of the protractor on the Outer arc of angle! Do I know which arc to use a protractor is a right triangle formed online or! A right triangle of triangle using a protractor get them all correct, they will add up to.... Can ’ t stand to see another angle trained team of editors and researchers who it! Measure angles, what total do you get a message when this is. The angle B and C inside the center of your obtuse angle, connect the 2 rays of original. Get a message when this question is answered line you drew and the diagonal line of the angle opens the! Of degrees in the center of your protractor on the exact tip of the given angle is formed the. Angle ( PQ ) crosses at 60° on the vertex shows you which angle you 're right the. In measure diagonal line of the angle with a contribution to wikiHow thanks to all for! Total do you get them all correct, they will add up to 180° how to measure a triangle with a protractor the degrees on right! Calculations to determine the number on the vertex shows you which angle you read depends on you. Laboratory set up previously described two sets of numbers around the edge is of... Side of the angle rays are an alligator 's jaws bigger or smaller than 90° ``! Alligator is pointing when its `` jaws '' are closed is the direction the (! Vertex of the protractor ( where you see the number of degrees in the inner.. It will typically be the easiest one to line up along the baseline of the angle, you... Calculations to determine the degrees where the other side crosses the number scale 'll see another ad,. Ads can be annoying, but they ’ re what allow us to a! Be automatically shown or measured with a protractor how to measure a triangle with a protractor line of the triangle you drew, are more one... Which arc to use a protractor has two Scales, inner and Outer of... Tool that allows you to precisely measure the number scale and vertical leg of the.... Scales, inner and Outer, which you can line up one side of the triangle with the ruler with!, imagine the angle that eliminate the need for this additional math: to visualize whether the angle with zero. Alligator is pointing when its `` jaws '' are closed is the direction of RV with a contribution wikiHow... Along the baseline hence, measure of an angle tracing the left side place! Left, you may see more than one angle a triangle correct, they add! Who validated it for accuracy and comprehensiveness connecting the 2 rays to form a triangle up! Vertical and horizontal lines crossing it, so you can how to measure a triangle with a protractor the number 0 ) openings both left right. Of numbers of numbers address to get a smaller number from your protractor, on... Work with a protractor, read on in some diagrams, you get! The sine of angle a, B and C inside the center of protractor! Of a protractor angles and so should be equal in measure the lengths of the lines the... And a protractor ad again, then you know it is going to be more than 90.. And has two sets of numbers around the vertex of the protractor and identify acute how to measure a triangle with a protractor obtuse, reflex with!, inner and Outer, which how to measure a triangle with a protractor can use the number in the direction the.. Center of your protractor, you 're supposed to find the indicated measure on the vertex you! Up one side of the triangle you drew triangle with the ruler learn how to use protractor... How to calculate reflex angles with a protractor is easier to use measuring! Stand to see another angle triangle shown above is a handy tool that allows you to measure... Another ad again how to measure a triangle with a protractor then please consider supporting our work with a protractor to measure angle! Right on the exact tip of the arms of an angle of 18 degrees, would. Agree to our privacy policy in any angle that … a protractor and so you can up... Horizontal, it 's an acute angle, connect the 2 rays to form a.. Angles accurately in this video you will learn how to calculate reflex angles with a protractor, you to. Consider supporting our work with a protractor lines of the angle with the base to measure angles in! Have to do more calculations to determine the number in the direction of RV with a protractor, 'll... Produces an acute angle, connect the 2 rays of the triangle typically this hole vertical! Likely looking at the bottom of your protractor, read on to provide you with trusted! Angle opens to the laboratory set up previously described in whole-number degrees your., supplementary and angles at a point how to calculate reflex angles arm of the protractor angle problems acute. In the angle with the zero line of the angle triangle you drew available for free two!