Question

The diameters of two semi circles is 7cm and 14cm. Determine the perimeter

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Given:

• Diameter of first semi circle is 7 cm.
• Diameter of second si circle is 14 cm.

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To find:

• Perimeter of both the semi circles.

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Solution:

• We have two semi circles with different radius.

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Perimeter of a semi circle is written as

★ Perimeter = πr + 2r

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For the first semi circle

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→ Perimeter = 22/7 × 7 + 2(7)

→ Perimeter = 22 + 14

→ Perimeter = 36 cm

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For the second semi circle

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→ Perimeter = 22/7 × 14 + 2(14)

→ Perimeter = 22 × 2 + 28

→ Perimeter = 44 + 28

→ Perimeter = 72 cm

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Hence,

• Perimeter of first and second semi circle is 36cm and 72cm respectively.