Question

Work out the perimeter of a quarter-circle with radius 7cm.

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Answer 1

25

Explanation:

p=1÷4pir+2r

1÷4×22÷7×7+2(7)

=11cm+14cm

=25

Answer 2

3.5π cm²

Explanation:

let P represent the perimeter of a circle with radius 7

P = 2×π×r

= 2×π×7

= 14π

the perimeter of a quarter-circle with radius 7 = P÷4

= 14π÷4

= 3.5π