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25 votes
25 votes
If u = 3 inches, v = 4 inches, w = 7 inches, x = 7 inches, y = 8 inches, and z = 4 inches, what is the area of the object?

A.
52 square inches
B.
53 square inches
C.
56 square inches
D.
54 square inches

If u = 3 inches, v = 4 inches, w = 7 inches, x = 7 inches, y = 8 inches, and z = 4 inches-example-1
User Malditojavi
by
2.8k points

2 Answers

26 votes
26 votes

Answer:

B

Explanation:

=zxu

=4x3

12 square units

(z+v)x (y-u)

(4+4)x (8-3)

=8x5

=40 square units

(z+v)-x

(4+4)-7

8-7

=1 unit

(w+u)-y

(7+3)-8

10-8

2units

=0.5×1×2

= 1 square unit

=12+1+40

=52+1

=53 square units

User JMat
by
2.8k points
15 votes
15 votes

Answer:

B. 53 square inches

Explanation:

The attached figure is drawn to scale, and a grid is provided that makes it easier to see the dimensions of the various parts.

This figure can be easily decomposed into an overall rectangle with cutouts of a trapezoid at the top and a rectangle at the bottom right.

__

The overall rectangle has dimensions 8 units wide and 10 units high.

The trapezoid at the top has bases of 8 units and 7 units, and a height of 2 units.

The rectangle at the bottom right has dimensions of 4 units wide and 3 units high.

The area formulas for a rectangle and trapezoid are ...

A = LW . . . . area of a rectangle with length L, width W

A = 1/2(b1 +b2)h . . . . area of a trapezoid with bases b1, b2, and height h

__

Then the area of the figure is ...

figure area = overall rectangle - trapezoid - lower right rectangle

= (8 in)(10 in) - 1/2(7 in + 8 in)(2 in) -(4 in)(3 in)

= 80 in² -15 in² -12 in² = 53 in²

The area of the object is 53 square inches.

If u = 3 inches, v = 4 inches, w = 7 inches, x = 7 inches, y = 8 inches, and z = 4 inches-example-1
User Siamak Motlagh
by
2.3k points