Question

Pllz solve this plz plz

Answer 1

Answer:

Step-by-step explanation:

Circumference of a circle is 2πr

A . 44 = 2πr

44 / 2π = r

44 / 2 × 22/7 = r

44 / 44 / 7 = r

44 × 7 / 44 = 7

Radius = 7cm

B. 132 = 2πr

132 / 2π = r

132 / 2 × 22/7 = r

132 / 44/7 = r

132 × 7/ 44 = 3 × 7 = 21

Radius = 21cm

C. 264 = 2πr

264 / 2π = r

264 / 2 × 22/7 =r

264 / 44 /7 = r

264 × 7/44 = 6 × 7 = 42

Radius = 42 cm.

I hope this helps.

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Answer 2

Answer:

(a) r = 7    (b) r = 21    (c) r = 42

Step-by-step explanation:

Circumference of a circle= 2πr

a)    44=2πr

⇒ 44 = 2 x $\frac{22}{7}$ x r

⇒ 44 = $\frac{44}{7}$ x r

⇒ r = $\frac{44}{44}$ x 7

⇒∴ r = 7

b)  132 = 2πr

⇒ 132 = 2 x $\frac{22}{7}$ x r

⇒ 132 = $\frac{44}{7}$ x r

⇒ $\frac{132}{44}$ x 7 = r

⇒ r = 7x3

∴ r = 21

c)    264 = 2πr

⇒ 264 = $\frac{44}{7}$ x r

⇒ r = $\frac{264}{44}$ x 7

⇒ r = 6 x 7

∴ r = 42