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in an isosceles triangle there are two sides called legs that are the same length the third side is called the base of an isosceles triangle has perimeter 345 c

answer is not 166cm
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1 Answer

The perimeter of an isosceles triangle is:
       P = (length of one leg)+ (length of other leg) + (length of base)
       P = 2*(length of a leg) + (length of base)
 
So,
 
       345 cm = 2*(length of leg) + (length of base)
 
Now, insert the other know length and solve for the unknown length.