Which of the following formulas could be used to find the area, A, of a trapezoid with base lengths b1 and b2 and height h? A = b1 + b2 + h
A = ( b1 - b2) h
A = b1h + b2h
A = ( b1 + b2) h

afjnawenkfnjaw; enkanwelwaklalejjaw; fij

step-by-step explanation:

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.

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