Let the triangle be abc with equal sides ab,bc and ca
then perimeter = 3 ab = 12a + 18b
ab = = 4a + 6b ( each side will have this length)
Now since qr is a mid segment it will be = half length of ab
So qr = 2a + 3b Answer
The last selection should be your answer
Answer:
(x+3)^2+(y+2)^2=80
Step-by-step explanation: