Question

The perimeter of an isosceles triangle is $68\text{units}.$ If the length of the unequal side is $28\text{units}$, what is the length of the other two sides?

• A. $20\text{units and}20\text{units}$
• B. $18\text{units and}18\text{units}$
• C. $16\text{units and}16\text{units}$
• D. $28\text{units and}28\text{units}$

Answer 1

The correct option is B $18\text{units and}18\text{units}$

C) $20\text{units and}20\text{units}$

Perimeter $=68\text{units}$
Length of the unequal side $=28\text{units}$
Total length of two sides of the triangle $=68\text{units}-28\text{units}=40\text{units}$
Length of the equal sides of the triangle $=40\text{units}÷2=20\text{units}$