Question

Me ayudan hacer los 4 por fa vor

Answer 1

FIGURA "a"

$A = ( \frac{5 \: cm\times 1 \: cm}{2} ) + (5 \: cm \times 2 \: cm) \\ A = 2.5 \: {cm}^{2} + 10 \: {cm}^{2} \\ A = 12.5 \: {cm}^{2}$

FIGURA "b"

$A = (26 \: cm \times 2 \: cm) + ( \frac{10 \: cm\times 6 \: cm}{2} ) + ( \frac{16 \: cm\times 2 \: cm}{2} ) \\ A = 52 \: {cm}^{2} + 30 \: {cm}^{2} + 16 \: {cm}^{2} \\ A = 98 \: {cm}^{2}$

FIGURA "c"

$A = 2( \sqrt{( \sqrt{41 \: cm} ) {}^{2} - ({4 \: cm})^{2} } ) \times (4 \: cm + 4 \: cm) \\ A = 2( \sqrt{41 \: {cm}^{2} - 16 \: {cm}^{2} } ) \times 8 \: cm \\ A = 2( \sqrt{25 \: {cm}^{2} } ) \times 8 \: cm \\ A = 2(5 \: cm) \times 8 \: cm \\ A = 10 \: cm \times 8 \: cm \\ A = 80 \: {cm}^{2}$

FIGURA "d"

$A = (5 \: m \times 2 \: m) + (5 \: m \times 2 \: m) + (3 \: m \times 2 \: m) \\ A = 10 \: {m}^{2} + 10 \: {m}^{2} + 6 \: {m}^{2} \\ A = 26 \: {m}^{2}$