x( 10-x)÷2= 12

x？ - 10x+24=0

x 1=4，x2=6

Side length =√2? +3? =√ 13

Circumference = 4 √13 ≈14.4cm.

8. Set the width x.

(29+2x)(22+2x)3/4=29×22

X≈ 1.5 cm