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Mathematics 22 Online
Rylee88:

Help me please.

Rylee88:

(05.06)Use a net to find the surface area of the right triangular prism shown below:

Rylee88:

1 attachment
mhanifa:

This is the sum of areas of 3 rectangles and 2 triangles

mhanifa:

Can you determine the sides of each?

Rylee88:

Well, I don't know how to do this stuff XD

mhanifa:

Rectangle area is A = lw Triangle area is A = 1/2bh

mhanifa:

Do you know this?

Rylee88:

no lol

mhanifa:

The three rectangles have: l = 10, w = 7 l = 8, w = 7 l = 6, w = 7 The two triangles are same with: b = 6, h = 8 (or opposite)

mhanifa:

Can you use these numbers and the formulas above to find individual areas and sum up?

Rylee88:

So do I multiply it? XD (Sorry idk this stuff lol)

mhanifa:

Yes, multiply each pairs and sum up

Rylee88:

Ok

mhanifa:

Let me know what you get to double check, thanks

Rylee88:

70, 56, 42, 48.

mhanifa:

Yes, and their sum is your answer

Rylee88:

Ohhh do I add those? XD

mhanifa:

Yes

Rylee88:

216 thanks

mhanifa:

No problem, hope you can do same with your next question

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