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

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

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

asked
User Ryan Dines
by
8.9k points

2 Answers

2 votes
use the Pythagoras Theorem 
answered
User Chris Krycho
by
7.2k points
4 votes
20^2 + 21^2 = 27^2
400 + 441 = 729
881 = 729 (does not equal)

Not a right traingle
answered
User Neossian
by
7.3k points
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