A circle is inscribed in a square of side 10 cm. What is the area of the circle?

Practice Questions

Q1
A circle is inscribed in a square of side 10 cm. What is the area of the circle? (Use π = 3.14) (2020)
  1. 78.5 cm²
  2. 50 cm²
  3. 100 cm²
  4. 25 cm²

Questions & Step-by-Step Solutions

A circle is inscribed in a square of side 10 cm. What is the area of the circle? (Use π = 3.14) (2020)
  • Step 1: Identify the side length of the square, which is given as 10 cm.
  • Step 2: Calculate the radius of the inscribed circle. The radius is half of the side length of the square. So, radius = 10 cm / 2 = 5 cm.
  • Step 3: Use the formula for the area of a circle, which is Area = πr².
  • Step 4: Substitute the value of π (3.14) and the radius (5 cm) into the formula. So, Area = 3.14 * (5 cm)².
  • Step 5: Calculate (5 cm)², which is 25 cm².
  • Step 6: Multiply 3.14 by 25 cm² to find the area. So, Area = 3.14 * 25 = 78.5 cm².
  • Geometry – Understanding the relationship between a circle and a square, specifically how to calculate the radius of an inscribed circle.
  • Area Calculation – Applying the formula for the area of a circle (A = πr²) using the correct value for π and the radius.
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