Question

Line GJ is tangent to point A at point G.

If AG = 9 and GJ = 12, find AJ.

Answer 1

square root of 9^2+12^2

Answer 2

as you can see, if you draw a segment from a to j, you'll get the right triangle JAG, with right angle in A.

AJ would be the hypothenuse.

AJ = √AG²+GJ² = √9²+12² = √81+144 = √225 = 15 units.