Question

2. Find the diameter of the circle whose circumference is: a) 132 cm b) 11 cm c) 66 cm d) 74 cm​

Answer 1

Answer:

a) Circumference of 132cm:

Using the formulas

C=2πr

d=2r

Solving ford

d=C

π=132

π≈42.0169

b) Circumference of 11cm:

Using the formulas

C=2πr

d=2r

Solving ford

d=C

π=11

π≈3.50141

c) Circumference of 66cm:

Using the formulas

C=2πr

d=2r

Solving ford

d=C

π=66

π≈21.00845

d) Circumference of 74cm:

Using the formulas

C=2πr

d=2r

Solving ford

d=C

π=74

π≈23.55493

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