Math Problem Statement

Find the area enclosed by the figure. Use 3.14 for π and do not round your answer. (The figure is not to scale).

Solution

To solve for the area enclosed by the figure, let's break down the shape into two parts: a rectangle and a half-circle.

Step-by-Step Solution

  1. Rectangle Area:

    • The dimensions of the rectangle are given as 6yd6 \, \text{yd} (height) and 8yd8 \, \text{yd} (width).
    • The area of a rectangle is calculated by: Arearectangle=width×height=8×6=48yd2\text{Area}_{\text{rectangle}} = \text{width} \times \text{height} = 8 \times 6 = 48 \, \text{yd}^2
  2. Half-Circle Area:

    • The diameter of the half-circle is equal to the width of the rectangle, which is 6yd6 \, \text{yd}.
    • Therefore, the radius rr is: r=62=3ydr = \frac{6}{2} = 3 \, \text{yd}
    • The area of a full circle is given by πr2\pi r^2. For a half-circle, we take half of this area: Areahalf-circle=12πr2=12×3.14×32\text{Area}_{\text{half-circle}} = \frac{1}{2} \pi r^2 = \frac{1}{2} \times 3.14 \times 3^2 =12×3.14×9=12×28.26=14.13yd2= \frac{1}{2} \times 3.14 \times 9 = \frac{1}{2} \times 28.26 = 14.13 \, \text{yd}^2
  3. Total Area:

    • Adding the areas of the rectangle and half-circle together: Total Area=48+14.13=62.13yd2\text{Total Area} = 48 + 14.13 = 62.13 \, \text{yd}^2

Final Answer

The area enclosed by the figure is: 62.13yd262.13 \, \text{yd}^2

Would you like further explanation on any of the steps?


Related Questions

  1. What would the area be if the entire circle was included instead of a half-circle?
  2. How does changing the diameter of the half-circle affect the total area?
  3. If the width of the rectangle changed to 10 yards, how would that change the area?
  4. What is the perimeter of the figure, including the straight edges and the curved edge?
  5. How can you use integration to calculate the area of more complex shapes?

Tip:

When working with composite shapes, break them down into simpler shapes (like rectangles, triangles, and circles) to find the area easily.

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Math Problem Analysis

Mathematical Concepts

Geometry
Area Calculation
Composite Shapes

Formulas

Area of a rectangle: width × height
Area of a half-circle: (1/2) × π × r^2

Theorems

Basic area formulas for rectangles and circles

Suitable Grade Level

Grades 6-8