volume_mute
Area of a Circle – Approximation (d = 10 cm)
publish date: 2026/05/17 19:43:27.532901 UTC
volume_mute
The exact area of the circle with diameter 10 cm is \(25\pi\) cm². Using a calculator, approximate the area to the nearest tenth.
Correct Answer
78.5 cm²
Explanation
Using a calculator to multiply \(25 \times \pi\):
\[A \approx 78.53981634 \text{ cm}^2\]
To the nearest tenth, the area is 78.5 cm².
Reference
Mathematics for college students