Pls help i will give brainliest if right

What is the perimeter of trapezoid jklm? + units 2 + + units 9 + units 9 + + units

Can some one explain this i got sent this. is this a threat i’m scared

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