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Oduvanchick [21]
3 years ago
11

Georgia will use the pattern shown to make a square pyramid out of cardboard. The square pyramid will not have a bottom. How muc

h cardboard will she need if a = 14 in. and b = 9 in.? PLEASE HELP

Mathematics
2 answers:
skelet666 [1.2K]3 years ago
8 0

Answer:

252 inches

Step-by-step explanation:

i took the  test.

noname [10]3 years ago
5 0

Answer:

252 square inches

Step-by-step explanation:

Georgia needs 4 triangles, each of which has a base of 9 inches and a height of 14 inches. The area of a triangle is ...

A = (1/2)bh

so one face of Georgia's pyramid will have an area of ...

A = (1/2)(9 in)(14 in) = 63 in^2

Then all four faces will have a total area of ...

(63 in^2) · 4 = 252 in^2

_____

Comment on the pattern

The pattern shown includes the base of the pyramid. The problem text says the base is not included. We have assumed that the base is not included. (For Georgia's pyramid, a different pattern would be more to the point: see attachment.)

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