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3 years ago

5

A glass triangular prism for a telescope is 5.5 inches long. each side of the prism´s triangular bases is 4 inches long and abou

t 3 inches high. About how much glass covers the surface of the prism?

1 answer:

Stells [14]3 years ago

3 0

I wish I could help.

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Help (this for a friend)<br> a 62.1<br> b 117.4<br> c 122.1<br> d 164.5

kramer

Answer:

c. 122.1 cm

Step-by-step explanation:

so l * w + $\frac{\pi r^2}{2}$

since 6 cm is the diameter

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the radius (or r) is 3

so 18 * 6 + $\frac{3.14 * 3*3}{y}$

108 + $\frac{3.14*9}{y}$

108 + $\frac{28.26}{2}$

108 + 14.13 = 122.13

simplified: 122.1 cm

hope this helps:)

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