Question

Find the area of a triangle whose base and altitude are 5cm and 4cm respectively

Answer 1

area of a triangle
=1/2×base×height
=1/2×5×4
=5×2
=10 cm sqare

Answer 2

The formula for finding out the area of triangle is: 
$\frac{base * height}{2}$ or $\frac{bh}{2}$
Here, base is 5 cm and altitude or height is 4 cm. 
So, area of the triangle
$= \frac{4 cm*5 cm}{2}$
$= \frac{20 cm}{2}$
$= 10 cm^{2}$

Hope this may help you.