find ST, find UV, Find the perimeter of triangle RST, find SU

Answer:
(a). ST = 15 units; (b). UV = 3 units; (c). [tex]P_{RST}[/tex] = 54 units; (d). SU = 9 units
Step-by-step explanation:
The centroid of a triangle is the intersection of the three median of the triangle.
If a median of a triangle is a perpendicular, then a triangle is an isosceles triangle.