Question

Find the perimeter of a semicircle (including its diameter) of radius 7cm

Answer 1

here it is and hope helpful for you

Answer 2

$\Large{\underline{\underline{\textsf{\maltese\: {\red{Given :-}}}}}}$

☞ Radius of semicircle = 14cm

$\Large{\underline{\underline{\textsf{\maltese\: {\red{To Find :-}}}}}}$

☞ Perimeter of a semicircle ( including its diameter) = ?

$\Large{\underline{\underline{\textsf{\maltese\: {\red{Concept Implemented :-}}}}}}$

☞ Circumference of circle (⭕) = 2πr

☞ Semi Perimeter of circle (⭕) = πr

☞ Diameter = 2 × Radius

$\Large{\underline{\underline{\textsf{\maltese\: {\red{Solution :-}}}}}}$

» Perimeter of a semicircle ( including its diameter) = Semi Perimeter of circle + Diameter

» Perimeter of a semicircle ( including its diameter)

= πr + d

= πr + 2r

= r(π + 2)

= ${7(\dfrac{22}{7} + 2 )}$cm

= ${7(\dfrac{22 \; + \; 14}{7})}$cm

= $7 \; * \; \dfrac{36}{7}$ cm

= 36 cm

∴ The length of tape required to cover the edges of a semicircular disc is $\underline{\underline{\bf{36 \:cm}}}$.