college math
posted by kozy on .
Find the perimeter and area of a right triangle if the shortest side is 20 mm. and the longest side is 52 mm. Include correct units with each part of your solution.

Since it is a right triangle and 52 mm is the longest side, it is the hypotenuse and the other short side length is
sqrt[(52)^2  (20)^2] = 48 mm
For a right triangle, either short side can be considered the base and the other short side can be considered the height. That lets you calculate the area easily.
The area is (1/2)*(20)*(48) = 480 mm^2
Add the three sides for the perimeter