Answer:
6.3
Explanation:
You want the length of the unknown leg in a right triangle with hypotenuse 7 and leg 3.
Pythagorean theorem
The relation between legs 'a' and 'b' and hypotenuse 'c' is ...
a² +b² = c²
a² +3² = 7²
a² = 49 -9 = 40 . . . . . . subtract 3²
a = √40 ≈ 6.3
The length of the third side is about 6.3 units.
<95141404393>