Question

1) Triangle DEF has sides DE = 12, EF = 6, and DF = 8. Is triangle DEF congruent to triangle ABC? Show your work using the distance formula.

Answer 1

Explanation:

use phytagoras

c² = a² + b²

c² = 8² + 6²

c² = 64 + 36

c² = 100

c = √100

C = 10