madisonrosamond99
01.09.2019 •
Mathematics
Aglass prism on a chandelier is 75 millimeters long. a base of the prism is an equilateral triangle with side lengths of 9 millimeters and a height of about 7.8 millimeters. what is the approximate surface area of the prism?
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Ответ:
There are two triangles - one on each end. So we multiply our previous expression by 2.
Each rectangle is 75 millimeters long and 9 millimeters wide: 75*9 mm^2.
We have 3 rectangles each the same size so we multiply 75*9 by 3.
75*9*3 = 2025
2025 + 70.2 = 2095.2
Ответ: