Question

find area and circumference
radius =3.5
radius = 4.9​

Answer 1

Answer:

38.465 cm²

75.46 cm²

Hope it helps!

Answer 2

Answer:

1) 22,38.5 2) 9.8

Step-by-step explanation:

1)• Given radius of circle is r=3.5 cm

as we know that

Perimeter of circle with radius r is 2πr and area of circle is πr

2

So perimeter of circle is 2π(3.5)=

7

22

×7=22 cm

Area of circle is π(3.5)

2

=

7×4

22×7×7

=38.5 cm

2) •circumference is found by: c = 2πr

c = 2π(4.9) = 9.8π mm

If you need just a number we generally use

pi = 3.14