Flashcard: 4a.1 - 4a.4

Front

Solve for x: 2x + 3 = 17

Back

x = 7

Front

What is the vertex angle in a triangle with angles A, B, and C?

Back

The vertex angle is the angle opposite the base, typically denoted as angle C.

Front

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

Back

The third angle measures 80°.

Front

Find the measure of the indicated angle if it is complementary to 70°.

Back

The indicated angle measures 20°.

Front

What is the measure of angle b if it is supplementary to 144°?

Back

Angle b measures 36°.

Front

Define complementary angles.

Back

Complementary angles are two angles whose measures add up to 90°.

Front

Define supplementary angles.

Back

Supplementary angles are two angles whose measures add up to 180°.

Front

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

Back

The sum of the interior angles of 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 is the formula for finding the measure of an exterior angle of a triangle?

Back

The measure of an exterior angle is equal to the sum of the measures of the two opposite interior angles.