Question

Determine a área das seguintes figuras:​

Answer 1

Resposta:

a)

$a = \frac{d \times D}{2} \\ a = \frac{15 \times 20}{2} \\ a = 150$

b)

$a = \frac{b \times h}{2} \\ a = \frac{12 \times 5}{2} \\ a = 6 \times 5 = 30$

c)

$a = \frac{(b +B) \times h }{2} \\ a = \frac{(6 + 10) \times 3}{2} \\ a = \frac{16 \times 3}{2} \\ a = 8 \times 3 = 24m {}^{2}$

d)

$a = b \times h \\ a = 12.5 \times 6 \\ a = 75cm {}^{2}$

e)

$a = l {}^{2} \\ a = 20.5 {}^{2} \\ a = (20 + 0.5) \times (20 + 0.5) \\ a = 400 + 10 + 10 + 0.25 \\ a = 420.25$

f)

$a = b \times h \\ a = 8 \times 14 \\ a = 112cm {}^{2}$