A triangle has legs 10, 6, 7. Is it a right triangle?

nope

Step-by-step explanation:

pythagorean theorem will tell us if it a right triangle where the longest leg=c and the other legs = a and b

pythagorean theorem: a^2+b^2=c^2

if your values satify this equation, it is a right triangle

a = 7

b = 6

c = 10

does 10^2 equal 6^2 + 7^2?

100=36+49

100=85

this statement is not true so you do not have a right triangle