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Mila [183]
2 years ago
9

PLEASE HELP!

Mathematics
2 answers:
Andrej [43]2 years ago
3 0

Answer:

For the circle with the diameter of 7cm, the <u>area is about 38.48cm</u> and the <u>circumference is about 22cm</u>

For the circle with the diameter of 5cm, the <u>area is about 19.63cm</u> and the <u>circumference is about 15.7cm</u>

Step-by-step explanation:

The formula to find the area of a circle is pi*r^2

The formula to find the circumference is 2*pi*r

r = radius, which can be determined simply by taking the diameter, and dividing it by 2.

Alexxandr [17]2 years ago
3 0

Answer:

See below ~

Step-by-step explanation:

Circle 1 :

  • Area = πr² = 22/7 x (7/2)² = 11 x 7/2 = 77/2 = <u>37.5 cm²</u>
  • Circumference = 2πr = 2 x 22/7 x 7/2 = 2 x 11 = <u>22 cm</u>

Circle 2 :

  • Area = πr² = 22/7 x (5/2)² = 22/7 x 25/4 = 550/28 = <u>19.64 cm²</u>
  • Circumference = 2πr = 2 x 22/7 x 5/2 = 220/14 = <u>15.71 cm</u>
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