Alex is writing statements to prove that the sum of the measures of interior angles of triangle pqr is equal to 180°. Line m is parallel to line n

Inside angle R equals the outside angle of P on the same side, so angle R = 60

Inside angle Q equals the outside angle of P on the same side, so Q = 40

The last choice is correct

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

inverse operation of addition