12 ft 13 ft 5 ft Surface area 461 630ft J Rectangle | 19 (13) 247 ft I こ та Rectangle 2 (19) = 451²7 add ffa Rectangle 3 (19) — 247/+² 95f12 Triangle ½ (₂ Triangle 2 I

Algebra and Trigonometry (6th Edition)
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ChapterP: Prerequisites: Fundamental Concepts Of Algebra
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Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Please find out triangle 1 and 2
### Understanding Surface Area Calculation

In this example, we are calculating the surface area of a composite figure using different geometric shapes: rectangles and triangles.

#### Description and Diagram:
On the left side of the figure, we have a complex shape that appears to be a parallelogram divided into various sections. The labeled measurements include a height of 12 ft, a base of 19 ft, and an additional base segment of 5 ft and height segment of 13 ft.

#### Breakdown of Surface Area Calculation:

1. **Rectangle 1:**
   - Formula: \( \text{Base} \times \text{Height} \)
   - Calculation: \( 19 \text{ ft} \times 13 \text{ ft} = 247 \text{ ft}^2 \)

2. **Rectangle 2:**
   - Formula: \( \frac{1}{2} \times \text{Base} \times \text{Height} \)
   - Calculation: \( \frac{1}{2} \times 19 \text{ ft} \times 10 \text{ ft} = 95 \text{ ft}^2 \)
   - Note: This value is incorrectly calculated initially as 95 ft² and corrected later to 288 ft², possibly due to an error in input dimensions.

3. **Rectangle 3:**
   - Formula: \( \frac{5}{3} \times \text{Base} \times \text{Height} \)
   - Calculation: \( \frac{5}{3} \times 19 \text{ ft} = 95 \text{ ft}^2 \)
   - Note: This formula seems ambiguous and might be a mistake.

4. **Triangle 1 and Triangle 2:**
   - The areas are not calculated in this example but should follow the general formula for the area of a triangle: 
   \[ \text{Area} = \frac{1}{2} \times \text{Base} \times \text{Height} \]

#### Total Surface Area:
- The total surface area calculated is \( 630 \text{ ft}^2 \).

This thorough calculation and breakdown of individual components help in understanding the surface area of combined shapes, which is crucial for various applications in mathematics and geometry.
Transcribed Image Text:### Understanding Surface Area Calculation In this example, we are calculating the surface area of a composite figure using different geometric shapes: rectangles and triangles. #### Description and Diagram: On the left side of the figure, we have a complex shape that appears to be a parallelogram divided into various sections. The labeled measurements include a height of 12 ft, a base of 19 ft, and an additional base segment of 5 ft and height segment of 13 ft. #### Breakdown of Surface Area Calculation: 1. **Rectangle 1:** - Formula: \( \text{Base} \times \text{Height} \) - Calculation: \( 19 \text{ ft} \times 13 \text{ ft} = 247 \text{ ft}^2 \) 2. **Rectangle 2:** - Formula: \( \frac{1}{2} \times \text{Base} \times \text{Height} \) - Calculation: \( \frac{1}{2} \times 19 \text{ ft} \times 10 \text{ ft} = 95 \text{ ft}^2 \) - Note: This value is incorrectly calculated initially as 95 ft² and corrected later to 288 ft², possibly due to an error in input dimensions. 3. **Rectangle 3:** - Formula: \( \frac{5}{3} \times \text{Base} \times \text{Height} \) - Calculation: \( \frac{5}{3} \times 19 \text{ ft} = 95 \text{ ft}^2 \) - Note: This formula seems ambiguous and might be a mistake. 4. **Triangle 1 and Triangle 2:** - The areas are not calculated in this example but should follow the general formula for the area of a triangle: \[ \text{Area} = \frac{1}{2} \times \text{Base} \times \text{Height} \] #### Total Surface Area: - The total surface area calculated is \( 630 \text{ ft}^2 \). This thorough calculation and breakdown of individual components help in understanding the surface area of combined shapes, which is crucial for various applications in mathematics and geometry.
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