Question

the diameter of the circle is 14cm . find its circumference and area
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Answer 1

Answer:

Diameter=14cm

Radius=14/2=7cm

Step-by-step explanation:

Therefore

Circumference=2×pie×radius

=2×22/7×7

=2×22

=44cm

Area=pie×radius×radius

=22/7×7×7

=22×7

=154cm square

Answer 2

Question :-

The diameter of the circle is 14 cm .

Find its circumference and area .

Answer :-

$\star \: \: \sf{\red{circumfrance} \: of \: \blue{ circle} \: is \: \orange{ 44 }\: cm} \: \: \\ \\ \star \: \: \sf{ \red{area }\: of \: \orange{circle} \: is \: \green{ 154 \: {cm}^{2} }} \:$

To Find :-

→ Circumference of circle.

→ Area of circle .

Formula used :-

$\star \boxed{ \sf{ \red{circumfrance \: of \: circle} = 2 \pi \: r} }\\ \\ \star \boxed{ \sf{ \green{area \: of \: circle} = \pi \: {r}^{2} }}$

Step - by - step explanation :-

According to the question,

Given diameter of circle is 14 cm

$\implies \sf{ radius(r) = \pink{ \frac{diameter}{2} }} \\ \\ \implies \sf{ \red{radius \: (r)} = \green{ \frac{14}{2} = 7 \: cm}}$

Hence,

$\rightarrow \sf{ \orange{circumfrance \: of \: circle }= 2 \pi \: r} \\ \because \: \pi = \frac{22}{7} \\ \\ \rightarrow \: 2 \times \frac{22}{7} \times 7 \\ \\ \rightarrow \: 44 \: cm \\ \\ \star \: \: \sf{\red{circumfrance} \: of \: \blue{ circle} \: is \: \orange{ 44 }\: cm} \:$

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Now ,

$\rightarrow \sf{ \red{area }\: of \: \green{circle (A)}= \orange{\pi \: {r}^{2} }} \\ \\ \rightarrow \sf{ A \: = \frac{22}{7} \times 7 \times 7} \\ \\ \rightarrow \boxed{ \sf{A \: = \red{154 \: {(cm)}^{2}} }} \\ \\ \star \: \: \sf{ \red{area }\: of \: \orange{circle} \: is \: \green{ 154 \: {cm}^{2} }}$

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