Question

determine (a) the area and (b) the perimeter of the quadrilateral. a. the area of the quadrilateral is (type a whole number.)

Explanation:

Step1: Convert units

First, convert 7 yards to feet. Since 1 yard = 3 feet, then 7 yards = 7×3 = 21 feet.

Step2: Calculate the area

The quadrilateral is a rectangle with length $l = 21$ feet and width $w=21$ feet. The area formula of a rectangle is $A=l\times w$. So $A = 21\times21=441$ square - feet.

Step3: Calculate the perimeter

The perimeter formula of a rectangle is $P = 2(l + w)$. Substitute $l = 21$ feet and $w = 21$ feet into the formula, we get $P=2(21 + 21)=2\times42 = 84$ feet.

Answer:

a. 441
b. 84