Patrick B. answered 01/12/19
Math and computer tutor/teacher
OK suppose the triangle has vertex points on the graph at
(0,0)
(0,5)
(12,0)
The distance formula says, the measure of the legs are 5 and 12.
The pythagorean theorem says the hypotenuse is 13.
The area is therefore 1/2 * 5 * 12 = 30 and the perimeter is also 5+12+13 = 30 as well