E16 inches H 20 inches SALE! 12 inches 4 inches 20 inches What is the area of the sign? A. 312 inches2 B. 336 inches? C. 384 inches² D. 400 inches?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter10: Measurement, Area, And Volume
Section10.5: Surface Areas Of Prisms And Cylinders
Problem 19E
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### Geometry Word Problem: Area of a Store Sign

#### Problem Description
A store places the sign shown below in their window to attract customers. The sign is an irregular octagon with specified dimensions.

#### Diagram Explanation
- The sign has a top and bottom width of 16 inches.
- The height through the middle of the central rectangle is 12 inches.
- The height of each trapezoidal section on the top and bottom is 4 inches.
- The total width at the widest part of the sign, which includes the entire horizontal span of the trapezoidal sections, is 20 inches.

#### Question
What is the area of the sign?

#### Multiple Choice Answers
A.  312 inches²  
B.  336 inches²  
C.  384 inches²  
D.  400 inches²

The sign can be broken down into three shapes: a rectangle and two trapezoids.

- **Rectangle:** 
   - Width = 16 inches
   - Height = 12 inches
   - Area = \(16 \text{ inches} \times 12 \text{ inches} = 192 \text{ inches}^2\)

- **Trapezoids:** 
   - Top base = 16 inches
   - Bottom base = 20 inches
   - Height = 4 inches
   - The area of one trapezoid can be found using the formula for the area of a trapezoid: \( \text{Area} = \frac{1}{2} \times (\text{Base}_1 + \text{Base}_2) \times \text{Height} \)
   - Area of one trapezoid = \( \frac{1}{2} \times (16 \text{ inches} + 20 \text{ inches}) \times 4 \text{ inches} = \frac{1}{2} \times 36 \text{ inches} \times 4 \text{ inches} = 72 \text{ inches}^2\)
   - Since there are two trapezoids: Total area of trapezoids = \(2 \times 72 \text{ inches}^2 = 144 \text{ inches}^2\)

- **Total Area of the Sign:**
   - Area of rectangle + Area of trapezoids = 192 inches² + 144 inches² = 336 inches²

Thus, the
Transcribed Image Text:### Geometry Word Problem: Area of a Store Sign #### Problem Description A store places the sign shown below in their window to attract customers. The sign is an irregular octagon with specified dimensions. #### Diagram Explanation - The sign has a top and bottom width of 16 inches. - The height through the middle of the central rectangle is 12 inches. - The height of each trapezoidal section on the top and bottom is 4 inches. - The total width at the widest part of the sign, which includes the entire horizontal span of the trapezoidal sections, is 20 inches. #### Question What is the area of the sign? #### Multiple Choice Answers A. 312 inches² B. 336 inches² C. 384 inches² D. 400 inches² The sign can be broken down into three shapes: a rectangle and two trapezoids. - **Rectangle:** - Width = 16 inches - Height = 12 inches - Area = \(16 \text{ inches} \times 12 \text{ inches} = 192 \text{ inches}^2\) - **Trapezoids:** - Top base = 16 inches - Bottom base = 20 inches - Height = 4 inches - The area of one trapezoid can be found using the formula for the area of a trapezoid: \( \text{Area} = \frac{1}{2} \times (\text{Base}_1 + \text{Base}_2) \times \text{Height} \) - Area of one trapezoid = \( \frac{1}{2} \times (16 \text{ inches} + 20 \text{ inches}) \times 4 \text{ inches} = \frac{1}{2} \times 36 \text{ inches} \times 4 \text{ inches} = 72 \text{ inches}^2\) - Since there are two trapezoids: Total area of trapezoids = \(2 \times 72 \text{ inches}^2 = 144 \text{ inches}^2\) - **Total Area of the Sign:** - Area of rectangle + Area of trapezoids = 192 inches² + 144 inches² = 336 inches² Thus, the
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