Which measures are the sides lengths of a right triangle?
a) 2cm, 5cm,10cm
b) 6cm, 9cm,12cm
c) 4cm, 7cm,10cm
d) 6cm, 8cm,10cm

In a right triangle the square of the longest side is equal to the sum of the squares of the other sides.

a)

not true
it isn't a right triangle

b)

not true
it isn't a right triangle

c)

not true
it isn't a right triangle

d)

true
it is a right triangle

The answer is D.

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