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netineya [11]
3 years ago
14

In the square pyramid below, a = 12 ft and b = 10 ft.

Mathematics
2 answers:
Paul [167]3 years ago
7 0

Answer:the corret answer was 340 i just did it on edgeunity and it was correct

Step-by-step explanation:

zmey [24]3 years ago
3 0

Answer:

The answer is 340ft²

Step-by-step explanation:

From the given diagram

Height a= 12ft

Base b= 10 ft

The square pyramid when unfolded has

1. 4 triangular parts

2. A square part

Hence the surface area of the square pyramid = 4 triangular parts plus square part

We know that the area of a triangle

A=1/2b*h

A= 1/2(10*12)

A= 120/2

A= 60ft²

Area of all 4 triangle = 60*4=

240ft²

Also area of square base

A= b²

A= 10²

A=100ft²

Total surface area = 240+100= 340ft²

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Answer:

  140

Step-by-step explanation:

When working HCF and LCM problems, I like to think in terms of this little diagram:

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