This is my hw. heelp

What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm

Determine the area of a triangle with (see picture below)

Points j and k plotted on the coordinate grid are two vertices of rectangle jklm rectangle jklm has an area of 7 square units point j is located at 2,1 and point k is located at -5,1 each vertex of the rectangle is located at a point that has integer coordinates. what is the perimeter of rectangle jklm? (need answer asap)