Respuesta :
Answer:
4.6cm
Step-by-step explanation:
5.4 is the length of one side and if you have 2 sides that are equal you double that
5.4 x 2 = 10.8
15.4 - 10.8 = 4.6cm
ANSWER IS 4.6
Since the triangle is isosceles then two sides will be equal
Perimeter =length +length+ length
Since the two sides are equal then
P=5.4+5.4+L=15.4
10.8+L=15.4
L=15.4-10.8
L=4.6
Since the triangle is isosceles then two sides will be equal
Perimeter =length +length+ length
Since the two sides are equal then
P=5.4+5.4+L=15.4
10.8+L=15.4
L=15.4-10.8
L=4.6