Geometric Concepts 7.11C

Front

What is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of a triangle is 180 degrees.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose sum is 180 degrees.

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

If one angle in a triangle measures 90 degrees, what type of triangle is it?

Back

It is a right triangle.

Front

What is the measure of each angle in an equilateral triangle?

Back

Each angle in an equilateral triangle measures 60 degrees.

Front

How do you find the measure of the third angle in a triangle if two angles are known?

Back

Subtract the sum of the two known angles from 180 degrees.

Front

What is the formula for the sum of the interior angles of a polygon?

Back

The formula is (n - 2) * 180 degrees, where n is the number of sides.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

If two angles are complementary, what is their sum?

Back

The sum of complementary angles is 90 degrees.