Question

Please give full explanation

Answer 1

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

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Reminder :

Area of the triangle = ½ × base × height

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Thus :

`S (ABCD) = ( (1)/(2) * 10 * 3) + ( (1)/(2) * 10 * 5) \\`

`S (ABCD) = 15 + 25`

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

There you go...

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