Question

R is a point which is 13 units from the origin if its x co-ordinates is 12 find the possible values of the y co-ordinate

Answer 1

±5

Explanation:

Apply the Pythagorean Theorem:

x^2 + 12^2 = 13^2, or

x^2 = 169 - 144 = 25

The possible y-coordinate vaues are ±√25, or ±5