Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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
Transcribed Image Text:**4) Find the area of the composite shape.**
The image shows a composite shape plotted on a Cartesian coordinate grid. The axes are labeled \(x\) and \(y\) with the origin point labeled \(O\). The shape is composed of a combination of linear and curved segments, specifically:
- It consists of a rectangle, a triangle, and half a circle.
**Points and Segments:**
- Point \(O\) is at the origin.
- Point \(A\) is located 6 units up the \(y\) axis from the origin.
- Point \(B\) is located 6 units to the right and 2 units up along the \(x\) and \(y\) axes respectively from the origin.
- Point \(C\) is located 6 units to the right along the \(x\) axis and is on the same horizontal line as with \(B\).
- Point \(D\) is located 4 units down from the origin on the negative \(y\) axis.
- Point \(E\) is joined to point \(D\) in a curved manner, forming the semicircle end of the shape, and is horizontally in line with \(C\).
- Point \(F\) is located 4 units up on the \(y\) axis from the point of intersection of the semicircle and forms a right angle triangle with points \(A\) and \(C\).
**Steps to find the area:**
1. **Rectangle Calculation**:
- Identify the length and width of the rectangle.
- The rectangle is made by the points \(O, C, F, E\). Using the coordinate grid, the length of the rectangle along the \(x\)-axis is 6 units, and the height along the \(y\)-axis is 4 units.
- Area = Length × Width = 6 units × 4 units = 24 square units.
2. **Right Triangle Calculation**:
- Identify the base and height of the right triangle \(\triangle ACB\).
- Using the coordinate grid, the base is 6 units along the \(x\) axis, and the height is 4 units along the \(y\) axis.
- Area = \(\frac{1}{2} \times Base \times Height\) = \(\frac{1}{2} \times 6 \text{ units} \times
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