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Ainat [17]
3 years ago
14

Awnser both if u can tysm if u do

Mathematics
1 answer:
Sunny_sXe [5.5K]3 years ago
6 0

21) C: 4/1

(I cannot answer 20)

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A square pyramid has a base with side lengths each measuring 40 inches. The pyramid is 21 inches tall, with a slant height of 29
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Answer    

Find out the  what is the surface area of the pyramid .

To proof

Formula

Surface area of a square pyramid

= a^{2} + 2a \sqrt{\frac{a^{2}}{4} +h^{2}

Where a is the base edge and h be the height .

As given

A square pyramid has a base with side lengths each measuring 40 inches. The pyramid is 21 inches tall, with a slant height of 29 inches.

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= 40^{2} + 2\times40\times\sqrt{\frac{40^{2}}{4} +21^{2}

solving

= 1600 + 80 \sqrt{\frac{1600}{4} + 441

= 1600 + 80\times\sqrt{841}

\sqrt{841} = 29

= 1600 + 80 × 29

= 3920 inches²

Therefore the surface area of the pyramid is 3,920 inches²

Hence proved

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3 years ago
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The clock below shows time that lance got home from school. 3:32. What time did he get home A: seventeen minutes before three B:
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If Lance got home from school at 3:32 p.m. A and B both represent:

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Hope this helps ;)

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