# geometry

The lateral area of the right regular triangular prism is 18 cm^2.Find the total surface area.give your answer in decimal form rounded of to 2 decimal places

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1. Can't tell. The two bases are equilateral triangles, but the three lateral faces are rectangles of area 6. But is the prism tall and skinny, or short and fat?

You must know either the height of the prism, or the side length of its bases.

If the bases are of side 2s, then each base has area √3 s^2.

Now, go complete the calculation.

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posted by Steve
2. Tall and skinny..I found out the base of the triangle is 2.

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posted by dj
3. Find the volume of the given project in order to determine the number of feet of concrete needed. Round answers to the nearest whole number when necessary.

A driveway that is 30 feet long, 18 feet wide, and 4 inches thick

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posted by janaya

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