Question

me ajudem pfvr:((((
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Answer 1

Letra "E" é a mais provável.

Answer 2

Resposta:

$\textsf{letra D}$

Explicação passo a passo:

$\mathsf{(\overline{\rm BD})^2 = (\overline{\rm BC})^2 + (\overline{\rm CD})^2}$

$\mathsf{(\overline{\rm CD})^2 = (\overline{\rm BD})^2 - (\overline{\rm BC})^2}$

$\mathsf{(\overline{\rm CD})^2 = (17)^2 - (8)^2}$

$\mathsf{(\overline{\rm CD})^2 = 289 - 64}$

$\mathsf{(\overline{\rm CD})^2 = 225}$

$\mathsf{\overline{\rm CD} = 15\:m}$

$\mathsf{S_{ABCD} = \dfrac{(B + b)h}{2}}$

$\mathsf{S_{ABCD} = \dfrac{(30 + 15)8}{2}}$

$\mathsf{S_{ABCD} = (45)4}$

$\boxed{\boxed{\mathsf{S_{ABCD} = 180\:m^2}}}$

$\mathsf{S_{BCD} = \dfrac{b \times h}{2}}$

$\mathsf{S_{BCD} = \dfrac{15 \times 8}{2}}$

$\mathsf{S_{BCD} = (15)4}$

$\boxed{\boxed{\mathsf{S_{BCD} = 60\:m^2}}}$

$\mathsf{S_{ACD} = S_{ABCD} - S_{ABC}}$

$\mathsf{S_{ABC} = \dfrac{b \times h}{2}}$

$\mathsf{S_{ABC} = \dfrac{30 \times 8}{2}}$

$\mathsf{S_{ABC} = (30)4}$

$\mathsf{S_{ABC} = 120\:m^2}$

$\mathsf{S_{ACD} = 180 - 120}$

$\boxed{\boxed{\mathsf{S_{ACD} = 60\:m^2}}}$