find the area and circumference of the circle of radius is :a)4.2cm
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Answer:
circumference = 26.4 (2*22/7*r)
area= 55.44 (22/7*r*r)
Answered by
1
Area of a circle : πr²
Where, r is the radius of 4.2cm
Taking ‘π’ as 22/7
→ 22/7 × (4.2)²
→ 22/7 × 17.64
→ 22 × 2.52
→ 55.44cm²
And also, the circumstance
→ 2πr
→ 2 × 22/7 × 4.2
→ 2 × 22 × 0.6
→ 44 × 0.6
→ 26.4cm
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