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IrinaK [193]
3 years ago
11

A regular square pyramid has a base length of 6 cm. the slant height of the pyramid is 9 cm. what is the surface area of the reg

ular pyramid?
A 90 cm^2
B 120 cm^2
C 144 cm^2
D 252 cm^2

Mathematics
1 answer:
PolarNik [594]3 years ago
6 0
So..hmm check the picture below

the pyramid is really just 4 triangles and 1 square at the bottom, all stacked up to each other at the edges

get the area of the square bottom, is just a 6x6 square,  thus the name of the pyramid

and get the area of each triangle, notice the base  is 6, the altitude or height is 9

and add them all up, that's the surface area of the pyramid

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