Transversals and Triangles

Supplementary angles, are ___.

• 2 angles whose sum is 180 degrees

• 2 angles whose sum is 90 degrees

• 2 angles that are equal

• 2 angles that help each other be better

Vertical angles are ___.

• 2 angles whose sum is 180 degrees

• 2 angles whose sum is 90 degrees

• 2 angles that are equal in measure

• 2 angles that are next to each other

Corresponding angles ___.

• have a sum of 180 degrees

• are equal

• have a sum of 90 degrees

• write letters with snail mail

The picture shows a triangle's ___ angles.

• internal

• external

Angle "x" is a(n) ___ angle.

• interior

• exterior

• perfect

Which statement is true?

• X + Y = Z

• X + Y = W

• X + Y + Z = W

• X + Y = 180

Answer explanation

The external angle is equal to the sum of the opposite 2 angles. This is true because the sum of all 3 angles within a triangle is 180 and the sum of an interior angle and its adjacent exterior angle is also 180.

What is the value of "x"?

• 109

• 19

• 180

• 71

Answer explanation

An exterior angle is equal to the measure of the sum of the 2 opposite interior angles

What is the measure of angle CBA?

• 20

• 70

• 180

• 30

Answer explanation

150 - 120 = 30

because the sum of the 2 opposite interior angles eqauls the measure of the exterior angle

Vertical angles are ___.

• congruent

• supplementary

• complementary

• stacked

Answer explanation

across from one another diagonally about the vertex (intersection of the parallel line and transversal).

Corresponding angles are ___.

• supplementary

• congruent

• complementary

• not related

Answer explanation

1&5

3&6

2&8

4&7

These angles are in the same position around the vertex (parallel line crosses the transversal)