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lisov135 [29]
3 years ago
9

The base edge of the regular triangular pyramid is b=10 cm and altitude of the base hb ≈ 8.66 cm. The slant height of the pyrami

d is k=8 cm. Find:
Lateral area of the pyramid
Mathematics
1 answer:
oksian1 [2.3K]3 years ago
5 0

Answer:

The lateral area of the pyramid is 120\ cm^{2}

Step-by-step explanation:

we know that

The lateral area of the pyramid is equal to the area of its three triangular lateral faces

so

LA=3[\frac{1}{2}(b)(k)]

where

b=10\ cm

k=8\ cm ------> the slant height

substitute the values

LA=3[\frac{1}{2}(10)(8)]=120\ cm^{2}

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