Exercise 19 Page 303

To find the area of a trapezoid, calculate one half the product of the height and the sum of the bases.

105ft^2

Practice makes perfect

Let's find the area of the given trapezoid. The area of a trapezoid is one half the product of the height and the sum of the bases.

Let's rotate the figure to make it easier to see the height and the bases!

In the given trapezoid, the height is 10 feet and the bases are 7.5 feet and 13.5 feet. We can substitute these values into the formula for the area of a trapezoid. Let's do it!

A=1/2h(b_1+b_2)

SubstituteValues

Substitute values

A=1/2* 10* ( 13.5+ 7.5)

▼

Evaluate right-hand side

AddTerms

Add terms

A=1/2* 10* (21)

Multiply

A=1/2* 210

MoveRightFacToNumOne

1/b* a = a/b

A=210/2

CalcQuot

Calculate quotient

A=105

The area of the trapezoid is 105 square feet.

Subchapter links

Try It p.298-300

Self-Assessment for Concepts & Skills p.300

Self-Assessment for Problem Solving p.301

Review & Refresh p.302

Concepts, Skills, & Problem Solving p.302-304

Exercise 19 Page 303

Hints

Check the answer

Practice exercises

Assess your skill