Practicing Success
Find the area of the shaded portion of an equilateral triangle with sides 6 units shown in the following figure A circle of radius I unit is centred at midpoint of a side of the triangle. |
$\frac{1}{2}(9\sqrt{3}-\frac{11}{7})$ unit2 $\frac{1}{4}(9\sqrt{3}-\frac{11}{7})$ unit2 $\frac{1}{2}(6\sqrt{3}-\frac{11}{7})$ unit2 $\frac{1}{2}(9\sqrt{3}-\frac{22}{7})$ unit2 |
$\frac{1}{2}(9\sqrt{3}-\frac{11}{7})$ unit2 |
Area of the shaded part = \(\frac{1}{2}\) x area of a triangle - Area of the sector ⇒ \(\frac{1}{2}\) x \(\frac{√3\; × \; 36}{4}\) - (\(\Pi \) x \( { r}^{2 } \) x \({90}^\circ\))/\({360}^\circ\) ⇒ (\(\frac{1}{2}\) x 9√3) - (\(\frac{22}{7}\)) x 1 x \(\frac{1}{4}\) ⇒ (\(\frac{1}{2}\) x 9√3) - (\(\frac{11}{7}\)) x 1 x (\(\frac{1}{2}\)) ⇒ \(\frac{1}{2}\)(9√3 - \(\frac{11}{7}\)) Therefore, the answer is \(\frac{1}{2}\)(9√3 - \(\frac{11}{7}\)) unit2 . |