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Lisa [10]
3 years ago
10

Hello can someone please help with this question.

Mathematics
2 answers:
quester [9]3 years ago
5 0

Answer:

x = 20.

Step-by-step explanation:

This is a right triangle, so by Pythagoras:

29^2 = x^2 + 21^2

x^2 = 29^2 - 21^2

x^2 =  400

x = √400

x = 20.

nexus9112 [7]3 years ago
4 0

Answer:

20

Step-by-step explanation:

sqrt(29² - 21²)

sqrt(400)

= 20

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Answer:

Approximately 439.6 square millimeters.

Step-by-step explanation:

The formula for the surface area of a cone is the following:

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Step-by-step explanation:

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