Find the surface area of the rectangular prism. 2 cm 6 cm 3 cm 3 cm

Mathematics

1 answer:

Nookie1986 [14]3 years ago

7 0

Answer:

72. If the second 3cm has some relevance, leave a note and I'll come back and modify my answer.

Step-by-step explanation:

Givens

L = 6 cm

W = 3 cm

H = 2 cm

I don't know what the extra 3 cm is for.

Formula

SA = 2*L*W + 2*L*H + 2*H*W

SA = 2*6*3 + 2*6*2 + 2*2*3

SA = 36 + 24 + 12

SA = 72

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It is known
$\dfrac{\pi}{6} =30^{\circ}$ and
$\cos \dfrac{\pi}{6}= \dfrac{ \sqrt{3} }{2}$ (if you want to determine cosine of 30° you should draw the perpendicular line to the x-axis and find the point of intersection, the value of x-coordinate is the cosine of 30°).

The angle $\dfrac{5\pi}{6} =150^{\circ}$ and
$\cos \dfrac{5\pi}{6}=- \dfrac{ \sqrt{3} }{2}$ (see image).
The angle $\dfrac{7\pi}{6} =210^{\circ}$ and

$\cos \dfrac{7\pi}{6}=- \dfrac{ \sqrt{3} }{2}$ (see image).