Answer:

Step-by-step explanation:
Using the Pythagorean theorem, you can find the length KP:
KP = √(45² -36²) = √729 = 27
The area of ALP is the same as the area of AKP:
(1/2)(KP)(KA) = (1/2)(27)(36) = 486 . . . . square units
The perimeter is adding all the outside edges together:
4 + 1 +4 +1 + 3 + 1 = 14 cm.