Question

if a perimeter of a semicircular protacter is 180 then find its radius

plz ans it fast no sparm​

Answer 1

Answer:

$Since, Perimeter \: \: or \: \: Circumference \: \: of \: \: circle = \: 2\pi\:r \\ </p><p>Therefore, Perimeter \: \: or \: \: Circumference \: \: of \: \: semicircle = \: \frac{1}{2} \times 2\pi \: r \\ => \frac{1}{2} \times 2\pi \: r \: = 180 \\ => \frac{1}{2} \times 2 \times \frac{22}{7} \times r \: = \: 180 \\ => r = 180 \times \frac{7}{22} \\ r = 57.27$

Hence, radius is 57.27 cm..

hope it helps you.

Answer 2

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