Question

If the height of a triangle is $10cm$ and its area is $40{cm}^2$, then the base of the triangle is $6cm$.

• A. 8cm
• B. 18cm

Answer 1

The correct option is B

18cm

$\text{Area of a triangle}=\frac{1}{2}\times base\times height=40$

$\Rightarrow base=\frac{40\times 2}{height}$

$\Rightarrow base=\frac{80}{10}=8cm$