Daniel rides his bicycle 21km west and then 18km north. How far is he from his starting point?

asked Jul 13, 2020 126k views

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This is a right triangle. To find the length of the hypotenuse a^2 + b^2 = c^2.

21^2 + 18^2 = c^2

441 + 324 = c^2

765 = c^2

27.66 km

Fanfan answered Jul 19, 2020

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