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Find the area of the circle of radius 4....

Find the area of the circle of radius 4.2cm.

Text Solution

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The correct Answer is:
`55.44cm^2`
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Knowledge Check

  • Given below are the steps of construction of a pair of tangents to a circle of radius 4 cm from a point on the concentric circle of radius 6 cm. Find which of the following steps is wrong. (P) Step 1: Take a point O on the plane paper and draw a circle of radius OA = 4 cm. Also draw a concentric circle of radius OB = 6 cm. (Q) Step 2: Find the midpoint C of OB and draw a circle of radius BA= AO. Suppose this circle intersects the circle of radius 4 cm at P and Q. (R) Step 3: Join BP and BQ to get the desired tangents.

    A
    Only (P)
    B
    Only Q
    C
    Both (P) and (Q)
    D
    Both Q and R

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