Find the hypotenuse of a right triangle that has one side of 7 cm and another
one of 3 cm.

The hypotenuse is the square root of 58.
a^2+b^2=c^2
7^2+3^2=c^2
49+9=c^2
58=c^2
c= square root of 58

To find it, use the formula a^2 plus b^2=c^2. So 7 times 7 is 49, 3 times 3 is 9. 49 plus 9 is 58, take the square root of your answer which would be 7.6 because that is the square root of 58 rounded to the nearest tenth.