Question

ΔABC is a right Angle. If AB = 3 and AC = 7, find BC? Leave your answer in simplest radical form.

A) 2√13
B) 4√3
C) 2√3
D) √58

Answer 1

You apply the Pythagorean theorem and you'll have:
BC²=AB²+AC²
BC²=3²+7²
BC²=9+49
BC²=58
=> BC=√58
We cannot simplify √58 so the answer is D) √58