16Hit1600
Geometry and TrigonometryHardLength of a gentle ramp

Geometry and Trigonometry practice question

A wheelchair ramp rises 1 metre and makes an angle of 5° with the ground. To the nearest metre, how long is the ramp?

Answer: 11

The ramp is the hypotenuse: 1/sin 5° ≈ 11.5, which rounds to 11.

Common wrong answers

If you answered 1
1 is the rise.
If you answered 20
20 guesses a 1-in-20 gradient, which would be about 3°.
If you answered 57
57 uses 1/tan 1° or a degree-to-radian slip.

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