Question

Find the area of the following a semicircle of diameter is 15.4 cm

Answer 1

Answer:

$\sf{Area \: of \: semicircle = 93.17 {cm}^{2}}$

Step-by-step explanation:

$\sf{ \underline{Given}}:diameter = 15.4cm$

$\sf{ \underline{To \: find}}:area \: of \: semicircle$

$\sf{ \underline{Solution}}:$

$\sf{radius(r)= \frac{d}{2}}$

$\sf{radius(r) = \frac{15.4}{2}}cm$

$\sf{radius(r) = 7.7cm}$

$\sf{Area \: of \: semicircle = \frac{1}{2}\pi{r}^{2}}$

$\sf{= \frac{1}{2} \times \frac{22}{7} \times (7.7cm)^{2}}$

$\sf{= \frac{22}{14} \times 7.7cm \times 7.7cm}$

$\sf{ =\frac{22}{7} \times 59.29 {cm}^{2}}$

$\sf{ = 93.17 {cm}^{2}}$

$\bf \blue{\underline{Please \: mark \: it \: as \: brainlist \: answer}}$