Angle Relationships in Triangles

Front

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

Back

180 degrees.

Front

Define complementary angles.

Back

Two angles that add up to 90 degrees.

Front

Define supplementary angles.

Back

Two angles that add up to 180 degrees.

Front

What is an isosceles triangle?

Back

A triangle with at least two equal sides.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.

Front

What is an equilateral triangle?

Back

A triangle with all three sides equal and all angles measuring 60 degrees.

Front

What is the relationship between the angles in a right triangle?

Back

One angle is 90 degrees, and the sum of the other two angles is 90 degrees.

Front

If one angle of a triangle measures 50 degrees and another measures 60 degrees, what is the measure of the third angle?

Back

70 degrees.

Front

What is the exterior angle theorem?

Back

The exterior angle of a triangle is equal to the sum of the two opposite interior angles.

Front

What is a transformation in geometry?

Back

A change in the position, size, or shape of a figure.