The diagram shows parallel lines cut by two transversal lines creating a triangle. which statements are true? check all that apply. m∠a = 20° ∠b and the angle marked 60° are alternate exterior angles. m∠c = 100° because it is a vertical angle to the angle marked 100°. ∠b and ∠c are supplementary angles. m∠a + m∠b + m∠c = 180°

Step-by-step explanation:

Verify each statement

case A)

The statement is True

we know that

The measure of angle A is equal to the angle marked by corresponding angles

case B) ∠B and the angle marked   are alternate exterior angles

The statement is False

Because, ∠B and the angle marked   are corresponding angles

case C) because it is a vertical angle to the angle marked

The statement is True

we know that

------> by vertical angles

case D) ∠B and ∠C are supplementary angles

The statement is False

we know that

---> the sum is less than

case E)

The statement is True

we know that

and remember that

so

substitute

2

step-by-step explanation: