The side of an equilateral triangle whose perimeter is 72 cm is ​

24cm

Step-by-step explanation:

So a triangle has 3 sides and it is an equilateral triangle so each side should have the same length. The perimeter is 72 cm and that means we have to divide 72 by 3 and that equals 24cm.

the answer is (4,3)

since the rule for r0, 90º is (-y,x) and it was already applied to form the image, all you have to do is reverse the answer using this formula.