SOLUTION: refer to equaliateral if tringle ABC which has perimiter is 39 centermiter . If the midle point of the side conecting midpoints of conecting midle point of side and drawing new tr

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: refer to equaliateral if tringle ABC which has perimiter is 39 centermiter . If the midle point of the side conecting midpoints of conecting midle point of side and drawing new tr      Log On


   

Question 473909: refer to equaliateral if tringle ABC which has perimiter is 39 centermiter . If the midle point of the side conecting midpoints of conecting midle point of side and drawing new tringles is indefinitely.
a)write an infinite geometric series to represent the sum of the perimeter of all of the triangle.
b) Find the sum of the perimeter of all triangles.
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
a) 3*(13+%2B+13%2F2+%2B+13%2F2%5E2+%2B+13%2F2%5E3+...)

b) 3%2A%2813%2F%281-1%2F2%29%29+=+3%2A13%2A2+=+78 centimeters.