Does 8 10 12 make a right triangle?

no

the way to find out the answer is to use Pythagorean theorem (a2 + b2 = c2) a is one of the sides touching the right angle, b is the other side touching it and c is the hypotenuse ( the side that's not touching the right angle). the biggist side in a right triangle will always be the hypotenuse. you can plug in 12 to c because we know it's the biggest. the other two sides become a and b. this equation only works on right triangles so when we plug everything in, if they don't equal each other than it's not a right triangle. otherwise it is. a2 + b2 = c2 , 82 + 102 = 122 , 64 + 100 = 144 ,

164 = 144. these numbers don't equal each other so these sides don't make a right triangle.