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3 years ago

12

PLEASE HELP ME I DON'T KNOW HOW TO DO THIS

1 answer:

azamat3 years ago

8 0

Area of each lateral area = 1/2 * 14* 15
Total lateral area ( as it has 3 lateral sides) = 3 * 1/2 * 14 * 15 = 315 cm^2

Total surface area = 315 * 1/2 * 14 * 15 = 420 cm^2

Hexagonal pyramid

Lateral area = 6 * area of each triangle = 6 * 1/2 *10 * 35 = 1050 cm^2

Total S A = 1050 + area of the hexagonal base = 1050 + 3 sqrt3 10^2 / 2
= 1050 + 259.8 = 1309.8 cm^2

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