Find the full surface of a regular quadrangular pyramid if the side of the base is 8 cm and the apothem is 15 cm.?
| December 13, 2020 | education
Our figure consists of 5 flat figures-4 triangles and a square (since the pyramid is regular). The area of the square-base is 8 ^ 2 = 64. The areas of triangles are found as half the product of the height and the base, i.e.
15 * 8 * 0.5 = 60. There are 4 areas.
Total 64 + 60 * 4 = 304 cm ^ 2
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