The triangle is an isosceles triangle because only 2 of the sides are equal.
Because the perimiter was provided all you need to do is set up an equation to determin the sides.
x+x+(x+5)=29
the variable x represents the unknown measurments of the sides.
First isolate the variable:
x+x+(x+5)=29
3x+5=29
3x=24
x=8
Your x measurment stands for the 2 smaller sides.
Add 5 to the variable to get your longer side.
8+5=13
Your long sided measurment is 13cm
To chesck your answer add your measurmens together to get the perimeter:
8+8+13=29
