explanation: finding the area of the entire rectangle (so if the triangle wasn’t there) would be 13 x 6 which equals 78. Now we find the area of the triangle, so 6 x 5 = 30/2=15. Then you do 78-15, which equals 63. Hope this helped!
89. first you find the area of the rectangle which is 8 x 13 = 104. Then you find the area of the triangle which is hb/2 the height is 6 and the base is 13-4-4= 5 so 30/2 is 15. Then you subtract the area of the triangle by the area of the rectangle. 104-15 so the answer is 89
