A ladder m long leans against a vertical wall. Its foot is m from the wall. How high up the wall does it reach?
Answer and explanation
Correct answer: B. 2 m
- Step 1: The ladder is the hypotenuse of a right-angled triangle.
- Step 2: Height.
- Step 3: Height m.
Answer
2 m.
Why not the others: 2.92 m: This adds the squares, which finds a hypotenuse rather than a shorter side. 1 m: This subtracts the lengths () without using Pythagoras. 4 m: This adds the lengths of the ladder and the foot distance.
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