radius d. perimeter For items 38-40. Find the circumference of these circles using = 3.14 38. 5 cm a. 31.4 cm C. 45.5 cm b.53.3 cm d. 61.4 cm 39. 10 m o a. 31.4 m b.70.1 m c. 62.8 m d. 75.6 m 40. O 15 cm a. 90.2 cm b.94.2 cm c. 92.4 cm d. 97.4 cm pa help
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Answer:
As we know that circumference of the circle is given as-
Circumference =2πr
Given:-
Circumference of the circle =31.4cm
∴2πr=31.4
⇒2×3.14×r=31.4
⇒r=5cm
Now again as we know that the area of the circle is given as-
Area =πr
2
⇒ Area =3.14×(25)
2
=78.5cm
2
Hence the radius and area of the circle is 5cm amd 78.5cm
2
respectively.
• The circumference of a circle is 31.4 cm. Find the radius and the area of the circle? (Take π=3.14)
• Observe the adjacent figure. It shows two circles with the same centre. The radius of the larger circle is 10cm and the radius of the smaller circle is 4cm
Find the area of the larger circle
Step-by-step explanation:
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