A triangle has sides with lengths of 20 millimeters, 24 millimeters, and 29 millimeters. Is it a right triangle?

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Answer 1 · 2016-11-28T04:16:42

No

#{(a = "20 mm"), (b= "24 mm"), (c= "29 mm") :}#

Use the Pythagorean Theorem:

#a^2 + b^2 = c^2#

Plug in the values

#20^2 + 24^2 = 29^2#

#400+576 != 841#

because

#400+576 = 976#

Thus, it is not a right triangle.