SOLUTION: The perimeter of an equilateral triangle, triangle RST is 72 inches. What is the length of an altitude of triangle RST A. 24 inches B. 12 radical 3 inches C. 12 radical 2

Algebra ->  Calculators  -> Pythagorean Theorem Solver, Cartoon Lesson, and practice -> SOLUTION: The perimeter of an equilateral triangle, triangle RST is 72 inches. What is the length of an altitude of triangle RST A. 24 inches B. 12 radical 3 inches C. 12 radical 2      Log On


   

Question 594469: The perimeter of an equilateral triangle, triangle RST is 72 inches. What is the length of an altitude of triangle RST

A. 24 inches
B. 12 radical 3 inches
C. 12 radical 2 inches
D. 12 inches

Answer by richwmiller(9135) About Me  (Show Source):
You can put this solution on YOUR website!
9*8=72
3*24=72
each side is 24
the base is 12
12^2+b^2=24^2
b=12sqrt(3) which is choice B)