Question

PLEASE ANSWER THIS STEP WISE

Answer 1

$2a + 2b = 32 \\ a + b = 16 \\ b = 16 - 4.5 \\ = 11.5$

Answer 2

let the shorter side be x cm
since the opposite sides  are equal
4.5 + 4.5 + 2x = 32
2x = 32 - 9
2x = 23
x = 11.5