jessie129 jessie129

27-02-2018
Mathematics

contestada

20 POINTS!!

a triangle has side lengths 20cm, 27cm, 21cm. is the triangle a right angle? show your work

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Bladerunner1976 Bladerunner1976

27-02-2018

20^2 + 21^2 = 27^2
400 + 441 = 729
881 = 729 (does not equal)

Not a right traingle

Answer Link

27-02-2018

use the Pythagoras Theorem

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