Question

The cross section of a shaft key takes the shape of a quarter circle. Find the perimeter and areaof this cross section of the shaft key

Answer 1

Perimeter and area of a quarter circle

Area

We know that the area of a complete circle is given by the equation:

$\pi\cdot r^2$

where π is a number, π=3.14 and r is the radius of the circle.

Then if we want to find its area we just need to divide it by 4:

$\frac{\pi\cdot r^2}{4}$

Perimeter

Since the perim