Question

Help me with this math question please its find the area <3

Answer 1

9.628 cm²

Explanation:

Let A be the area of the sector OAB

Let a be the area of the sector OCD

The shaded area = A − a

`\begin{aligned}A &=(1)/(12) (\pi * 7^(2)) \\&=12.828 \ldots\end{aligned}`

`\begin{aligned}a & = (1)/(12)\left(\pi * 3.5^(2)\right) \\&=3.2 \ldots\end{aligned}`

The shaded area ≈ 12.828 - 3.2 ≈ 9.628 cm²