Answer:
The length of each side of the triangle is 6.5 cm
Step-by-step explanation:
Perimeter of a triangle (p) = 2a + b
where a = length of side
b = base of the triangle
p = 20 cm
b = 7 cm
p = 2a +b
20 = 2a + 7
2a = 20 - 7
2a = 13
a = 13 /2
a = 6.5
a = 6.5 cm
since it is an isosceles triangle, the two sides are equal = 6.5 cm
