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harkovskaia [24]
3 years ago
5

A ladder reaches the top of a 20 foot building. the ladder is 4.5 feet away from the building. how long is the ladder?

Mathematics
1 answer:
KATRIN_1 [288]3 years ago
4 0

Answer:

C

Step-by-step explanation:

do that with pithagoras:

20² + 4,5² = x²

400 + 20,25 = x²

420,25 = x²

x = \sqrt{420,25}

x ~ 20,5

Letter C: 20,5 feet

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