Question

some body help me 8,9,10,​

Answer 1

Answer:

$8.area \: of \: right \: angled \: triangle = \frac{1}{2} \times base \times height \\ = \frac{1}{2} \times 9 \times 40 \\ = 9 \times 20 \\ = 180 \: {cm}^{2}$