Which of the following sets of numbers is not a pythagorean triple?
3, 4, 5
10, 15, 20
5, 12, 13
7, 24, 25

10,15,20

Step-by-step explanation:

Pythagorean triple is when three number satisfies .

For  3,4,5

if a=3, b=4 and c=5

then

The left hand and right hand side are satiesfied.

So, the numbers 3,4,5 are Pythagorean triple.

For  10,15,20

if a=10, b=15 and c=20

then

325400

The left hand and right hand side are not satiesfied.

So, the numbers 10,15,20 are not Pythagorean triple.

Hence, we get the set of numbers which are not Pythagorean triple that is 10,15,20.

c. prove the lengths are the same.

step-by-step explanation:

you need to prove the segments are congruent. congruent segments have the same length. find the lengths of the segments using the distance formula, and compare them.

answer: c. prove the lengths are the same.