in an isosceles triangle the base is 11 less than 3 times the length of the leg if the perimeter is 39 centimeters then find the length of the base A. 14B.10C.19D.20
Accepted Solution
A:
suppose the legs are x meters each, the base is 3x-11 the perimenter: x+x+(3x-11)=39 5x=50 x=10 so the base is 3*10-11=19 the answer is C.