Question

1. triangle jkl has vertices j(3, -7), k(7, -3) and l(3, 7). what are the coordinates of j after a 90° rotation counterclockwise about the origin? j(__, __)

Explanation:

Step1: Recall rotation rule

The rule for a 90 - degree counter - clockwise rotation about the origin is $(x,y)\to(-y,x)$.

Step2: Apply rule to point J

For point $J(3,-7)$, where $x = 3$ and $y=-7$. Substitute into the rule: $(-(-7),3)$.

Answer:

$(7,3)$