Question

Please give full explanation

Answer 1

S (ABCD) = S (ABC) + S (ADC)

_____________________________________________

Reminder :

Area of the triangle = ½ × base × height

_____________________________________________

Thus :

$S (ABCD) = ( \frac{1}{2} \times 10 \times 3) + ( \frac{1}{2} \times 10 \times 5)$

$S (ABCD) = 15 + 25$

$S (ABCD) = 40 \: \: {cm}^{2}$

There you go...

Have a great day ❤