triangles - find the missing angle

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180°.

Front

If one angle of a triangle is 90°, what type of triangle is it?

Back

It is a right triangle.

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

If two angles of a triangle are 30° and 70°, what is the measure of the third angle?

Back

80°.

Front

What is an exterior angle of a triangle?

Back

An exterior angle is equal to the sum of the two opposite interior angles.

Front

What are remote interior angles?

Back

The two interior angles of a triangle that are not adjacent to a given exterior angle.

Front

What is the definition of supplementary angles?

Back

Angles that add up to 180°.

Front

If one angle of a triangle is 120°, what is the maximum value of the other two angles?

Back

The maximum value of the other two angles can be 30° and 30°.

Front

What is the relationship between the angles in an isosceles triangle?

Back

In an isosceles triangle, the angles opposite the equal sides are equal.

Front

How do you find a missing angle in a triangle?

Back

Subtract the sum of the known angles from 180°.