Question 99911
16(20+X)/2=224
(320+16X)/2=224 CROSS MULTIPLY
320+16X=448
16X=448-320
16X=128
X=128/16
X=8 IS THE LENGTH OF THE OTHER SIDE.
PROOF
16(20+8)/2=224
(16*28)/2=224
448/2=224
224=224