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Those angles are called complementary.

Those angles are called complementary.

Those angles are called complementary.

Those angles are called complementary.

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14y ago
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14y ago

Those angles are called complementary.

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Q: What do you call two angles with the sum of their measure equaling 90 degrees?
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What is the measurement of the angles?

Angles greater than 0 but less than 90 degrees are acute angles. A 90 degree angle is a right angle. Angles greater than 90 but less than 180 degrees are obtuse angles. Angles greater than 180 but less than 360 degrees are reflex angles. A complete rotation of 360 degrees is a full turn.


Why are vertically opposite angles equal?

This would be much easier with a pic, but since I cant draw one for you here, you will need some imagination. Let us take 2 lines and create vertical angles at the intersection of those lines. I am going to call the pairs of vertical angles A, A' and B and B' where A and A' are vertical and B and B' are vertical. Now in your drawing notice that the sum of the degrees of A and B is 180 degrees, they are suplementary. But the sum of A and B' is also 180 degrees. So this means that the measure of B is equal to the measure of B'. We can do the same with A and A'.


What do you call polygons in which all sides have the same length and all angles have the same measure?

regular


What do you call polygons in which all sides have the same lenght and all angles have the same measure?

They are called regular polygons


If one angle is 10 more than 3 times as large as another angle which is complementary to it what is the measure of the smaller angle?

The smaller angle is 20 degrees and the larger is 70 degrees. Complementary angles total 90 degrees. Let's call the smaller angle A. The other angle is 3A + 10. The sum of both angles is 90, so 4A +10 = 90, 4A = 80, A = 20. The larger angle is 3(20) + 10 = 70.