SOLUTION: Please help me answer this question: Which ones are right angles? 4cm, 6cm, 10cm 9in, 12in, 15in 8ft, 5ft, {{{sqrt(89)}}} ft Why?

Algebra ->  Pythagorean-theorem -> SOLUTION: Please help me answer this question: Which ones are right angles? 4cm, 6cm, 10cm 9in, 12in, 15in 8ft, 5ft, {{{sqrt(89)}}} ft Why?       Log On


   

Question 695287: Please help me answer this question: Which ones are right angles?
4cm, 6cm, 10cm 9in, 12in, 15in 8ft, 5ft, sqrt%2889%29 ft Why?
Answer by reviewermath(1029) About Me  (Show Source):
You can put this solution on YOUR website!
+4%5E2+%2B+6%5E2+ ≠ 10%5E2, therefore NOT a right triangle
+9%5E2+%2B+12%5E2+ = 15%5E2, therefore it is a right triangle
+8%5E2+%2B+5%5E2+ = sqrt%2889%29%5E2, therefore it is a right triangle