Determine whether the forces in the pair are pulling at right angles to each other.

For the values a = 7.2 which is a leg of a right triangle, and value c = 11.1, which is the hypotenuse, find the length of the other leg, b, to the nearest tenth

a. 8.4

b. 13.2

c. 3.9

d. 5.0

Using Pythagorean theorem we get: a^2 +b^2 = c^2

7.2^2 + b^2 = !!.1^2

51.84 + b^2 = 123.21

b^2 = 123.21 - 51.84

b^2 = 71.37

b = 8.4 (nearest tenth)

Answer: a. 8.4

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