Triangle - is RT?

Triangle has a circumference of 90 cm. Side b is 1 cm longer than c, side c is 31 cm longer than side a. Calculate the length of sides and determine whether triangle is a right triangle.


a =  9 cm
b =  41 cm
c =  40 cm

c =


c = 31+a

b-c = 1
a-c = -31
a+b+c = 90

a = 9
b = 41
c = 40

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