Exercise 15 Page 626

The area of a trapezoid is one half the product of its base and the sum of its bases. We have been given that the lengths of the bases are 2 and 3 feet and that the height is 13 feet. Sincew e have the height and the lengths of the bases, we can substitute them into the formula for the area of a trapezoid.

A=1/2h(b_1+b_2)

SubstituteValues

Substitute values

A=1/2(1/3)( 2+3)

▼

Evaluate right-hand side

AddTerms

Add terms

A=1/2(1/3)(5)

MultFrac

Multiply fractions

A=1/6(5)

MoveRightFacToNumOne

1/b* a = a/b

A=5/6

The area of the trapezoid is 56ft^2.