What is the perimeter?
Help plz...And No links

36 units

Step-by-step explanation:

First calculate the length of side a.  Using the Pythagorean Theorem, we find that 15^2 = 12^2 + x^2, or 225 - 144 = x^2.  Thus, x^2 = 81 and the length of side a is √81, or 9, units.

Then the perimeter is the sum of all three side lengths:

15 + 9 + 12 = 36 units

answer: i'm great at algebra

~coco

step-by-step explanation:

a)(x-2)^2+(y-1)^2=9

step-by-step explanation:

(picture explains)