Question

please answer this.....

Answer 1

Perimeter means the boundary.

It is marked in red in the figure.

Perimeter if shaded region = 1/2 of perimeter of circle + sum of two sides of the triangle.

=> Perimeter = [1/2 × 2π × 10] + 12 + 16

=> Perimeter = 10π + 28

=> Perimeter = 10×3.14 + 28 = 31.4 + 28 = 59.4 cm

=> Perimeter = 59.4 cm

Answer 2

$\huge \underline \mathfrak {Solution:-}$

Radius = 10 cm

Perimeter of shaded region = 1/2 circumference of the circle + two sides of the triangle

= 10π + 12 + 16

= 31.4 + 28

= 59.4 cm

So, the perimeter of the shaded region is 59.4 cm.