You can read posting **Sarin learns Perimeter, Area and Volume in school(Math Concept) **to learn the concept of perimeter, area and volume.

Read also posting on **Sarin learns Shapes and Solids in school (Math Concept)** to know about shapes.

Upper primary school mathematics question UPQ104

Find the perimeter of a semicircle with radius 7 cm.

(Take π = 22/7)

Solution:

The perimeter of a circle = 2 × π × r

Length of the semicircle arc = 2 × π × 7 ÷ 2 = 22/7 × 7 = 22cm

The perimeter of the above semicircle = 22 + 7 + 7

= 36cm

Need to remember that perimeter is a enclosure of a figure. Remember to add the length that closing the semicircle.

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