Question

the circumference of the circle is 44 then find the area of the circle and area of the semi circle​

Answer 1

Answer:

Given :-

Circumference of the circle = 2πr=44

2πr = 44

2×22/7 × r = 44

r = 44×1/2×7/22

r = 7cm

:. Radius of the circle = 7cm.

Area of circle = πr²

= 22/7×7×7

= 22×7

= 154cm²

Area of semi circle = 1/2 area of circle

= 1/2 ×154

= 77 cm².

Hope it helps you....

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Answer 2

Answer:

Step-by-step explanation:

ANSWER:-

Given:-

• Circumference as 44 units.
• We need to find area of the circle.
• Also, we need area of semi circle.

Concept is:-

• We will find Radius by circumference of circle.
• Then we will find the area of whole circle.
• And them , we will divide the area by 2.

$\sf{Circumference = 2 \times \pi \times r}$

$44 = 2 \times \dfrac{22}{7} \times r$

$r = \dfrac{44 \times 7}{22 \times 2}$

Radius is 7 units.

We need now, area.

$\bf{Area \ of \ Circle = \pi \times r ^2}$

$= \dfrac{22}{7} \times 7 \times 7$

= 154 square units.

Area of semicircle now,

$\dfrac{154}{2} = 77 u^2$ is the answer.

Note:-

• We need to remember the formulas for areas of circle.
• We need to remember the formula for circumference, and here r is the radius of the circle,
• Diameter = 2*Radius of the same circle.