Question

um paralelepipedo retângulo outo tem comprimento
7cm, largura 3cm e altura 4 cm. qual a area total?

​

Answer 1

Resposta:

)v=7×3×4=84cm

3

\begin{gathered}b)at = 2(cl + ch + lh) \\ at = 2(7 \times 3 + 7 \times 4 + 3 \times 4) \\ at = 2(21 + 28 + 12 \\ at = 2 \times 61 = 122 {cm}^{2} \end{gathered}

b)at=2(cl+ch+lh)

at=2(7×3+7×4+3×4)

at=2(21+28+12

at=2×61=122cm

2

\begin{gathered} c){d}^{2} = {c}^{2} + {h}^{2} + {l}^{2} \\ {d}^{2} = 49 + 16 + 9 \\ {d}^{2} = 74 \\ \sqrt{d} = \sqrt{74} \end{gathered}

c)d

2

=c

2

+h

2

+l

2

d

2

=49+16+9

d

2

=74

d

=

74

d)84 \times {10}^{ - 3} {dm}^{3} = 84 \times {10}^{ - 3}ld)84×10

−3

dm

3

=