Question

Calcule a área das figuras planas
A quadrado com lado de 20 cm

Answer 1

Olá!

$a) \: \: \: \: \: a = {l}^{2} \\ \\ a = {20}^{2} \\ a = 400 \: {cm}^{2} \\ \\ \\ b) \: \: \: \: \:a = \frac{b \times h}{2} \\ \\a = \frac{6 \times 12}{2} \\a = \frac{72}{2} \\ a = 36 \: {cm}^{2} \\ \\ \\ c) \: \: \: \: \: a = b \times h \\ \\ a = 15 \times 10 \\ a = 150 \: {cm}^{2} \\ \\ \\ d) \: \: \: \: \: a = \frac{</strong><strong>D</strong><strong> \times d}{2} \\ \\ a = \frac{14 \times 7}{2} \\ a = \frac{98}{2} \\ a = 49 \: {cm}^{2} \\ \\ \\ e) \: \: \: \: \: a = \frac{(</strong><strong>B</strong><strong> + b) \times h}{2} \\ \\ a = \frac{(10 + 4) \times 8}{2} \\ a = \frac{14 \times 8}{2} \\ a = \frac{112}{2} \\ a = 56 \: {cm}^{2}$

Espero ter ajudado. Bons estudos!