Please help me with this maths question, brainiest and points will be given. THANK YOU!!!

The median am of triangle ∆abc is half the length of the side towards which it is drawn, bc . prove that triangle ∆abc is a right triangle, and find angle mac and abm

Luke wants to reduce the area of his rectangular garden by 1/4 the expression 14/w can be used to represent this change. what is another way to write this expression?

50 points~ ! i have to turn this in tomarrow