Question

The area of an isosceles right triangle whose base is 30 cm is:

• A. $450c{m}^2$
• B. $225\sqrt{3}c{m}^2$
• C. $5\sqrt{2}c{m}^2$
• D. none

Answer 1

The correct option is A $450c{m}^2$

Given Right angled Isosceles triangle with base $30$ $cm$

Hence $base=height$

Now $Area=\frac{1}{2}base\times height$

$\Delta =\frac{1}{2}\times 30\times 30$

$\Delta =450$ $c{m}^2$