Asked by Octivia

A ladder that is 12,5m long rests against a wall with its foot 7,5m away from the wall.How far the ladder reaches up the wall?
Answered by Ms. Sue
Use the Pythagorean Theorem and solve for b.

a^2 + b^2 = c^2

7.5^2 + b^2 = 12.5^2
56.25 + b^2 = 156.25
b^2 = 156.25 - 56.25
b^2 = 100
b = 10

Answered by Octivia
The foot of the ladder in 4.2 above moves 4m closer to the wall.How much further will the ladder now reach up the wall?
Answered by Ms. Sue
Use the Pythagorean theorem as I showed you above.

Answered by Octivia
Thank you
Answered by Ms. Sue
You're welcome.

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