Question

HELPPPPP ASAPPPPPPPPPPPPPPPP PLSSS

The length of the hypotenuse of a right triangle is \sqrt{21} units. The length of a leg of the triangle is 3 units. What is the length of the other leg of the triangle?

A. 3 units
B.2\sqrt{3} units
C. 2\sqrt{6} units
3. \sqrt{30} units

Answer 1

B) 2\ sq.rt{3}units

Explanation:

using Pythagoras theorem

a^2+ b^2=c^2

a^2+ 3^2=(√21)^2

a^2+9= 21

a^2=21-9

a^2=12

a=√12

a=2√3