Question

find the circumference and area of the following measures
(a) r=14cm
(b) d=21cm
(c) r=7cm​

Answer 1

Use these mathematical identities...

circumference = 2 pie (Radius)

Circumference = pie (Diameter)

Area of circle is pie (Radius)^2

Answer 2

Answer:

Step-by-step explanation:

1. Circumference=2πr=2*22/7*14=88

Area=πr*r=22/7*14*14=22*28=616

3. Circumference=2*22/7*7=44

Area=22/7*7*7=22*7=154

2. Circumference= 2*22/7*21/2=66

Area= 22/7*21/2*21/2= 11/2*3*21= 33*21/2=346.5