Question

Resolva as sequintes questoes

Answer 1

Explicação passo-a-passo:

1)

$\sf A=\dfrac{(B+b)\cdot h}{2}$

$\sf A=\dfrac{(6+3)\cdot8}{2}$

$\sf A=\dfrac{9\cdot8}{2}$

$\sf A=\dfrac{72}{2}$

$\sf \red{A=36~cm^2}$

Letra D

2)

=> Lado

$\sf 4L=60$

$\sf L=\dfrac{60}{4}$

$\sf L=15~m$

Os lados desse quadrado medem 15 m

=> Área

$\sf A=15^2$

$\sf A=15\cdot15$

$\sf \red{A=225~m^2}$

Letra C

3)

• $\sf h=100~cm~\Rightarrow~h=1~m$

$\sf A=b\cdot h$

$\sf A=2\cdot1$

$\sf \red{A=2~m^2}$

4)

=> Área

$\sf A=\dfrac{b\cdot h}{2}$

$\sf A=\dfrac{15\cdot20}{2}$

$\sf A=\dfrac{300}{2}$

$\sf A=150~m^2$

O valor gasto será $\sf 6\cdot150=900$ reais

Letra A

5)

$\sf A=\dfrac{D\cdot d}{2}$

$\sf A=\dfrac{30\cdot10}{2}$

$\sf A=\dfrac{300}{2}$

$\sf \red{A=150~cm^2}$

Letra A