The diameter of a circle is 4 in. Find its area in terms of T.

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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**Problem Statement:**
The diameter of a circle is 4 inches. Find its area in terms of \( \pi \).

**Solution:**
To find the area of a circle, use the formula:
\[ A = \pi r^2 \]

Given the diameter (d) is 4 inches, first find the radius (r):
\[ r = \frac{d}{2} = \frac{4}{2} = 2 \text{ inches} \]

Now use the radius to find the area:
\[ A = \pi \times (2)^2 = \pi \times 4 = 4\pi \text{ square inches} \]

Therefore, the area is:
\[ \boxed{4\pi \text{ in}^2} \]

**Interactive Answer:**
\[ \text{Answer: } A = \boxed{4} \pi \text{ in}^2 \]

**Submit Answer Button:**
(A blue button labeled "Submit Answer" is present for learners to submit their calculation.)

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This educational explanation includes the step-by-step process to solve the problem, ensuring clear understanding for the students visiting the website.
Transcribed Image Text:**Problem Statement:** The diameter of a circle is 4 inches. Find its area in terms of \( \pi \). **Solution:** To find the area of a circle, use the formula: \[ A = \pi r^2 \] Given the diameter (d) is 4 inches, first find the radius (r): \[ r = \frac{d}{2} = \frac{4}{2} = 2 \text{ inches} \] Now use the radius to find the area: \[ A = \pi \times (2)^2 = \pi \times 4 = 4\pi \text{ square inches} \] Therefore, the area is: \[ \boxed{4\pi \text{ in}^2} \] **Interactive Answer:** \[ \text{Answer: } A = \boxed{4} \pi \text{ in}^2 \] **Submit Answer Button:** (A blue button labeled "Submit Answer" is present for learners to submit their calculation.) --- This educational explanation includes the step-by-step process to solve the problem, ensuring clear understanding for the students visiting the website.
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