Question

Please help!!!!! Answer ASAP

Answer 1

`\large\boxed{P=5(3)/(10)\ cm=5.3\ cm}`

Explanation:

If you want find the perimeter, then you must add all lengths of sides of the given polygon.

`P=AB+BC+CD+DE+EA\\\\AB=1(3)/(4)\ cm,\ BC=1(1)/(10)\ cm,\ AE+DC=1(1)/(5)\ cm,\ DE=1(1)/(4)\ cm\\\\P=1(3)/(4)+1(1)/(10)+1(1)/(5)+1(1)/(4)=\left(1(3)/(4)+1(1)/(4)\right)+1(1)/(10)+1(1\cdot2)/(5\cdot2)\\\\=2(4)/(4)+1(1)/(10)+1(2)/(10)=3+2(3)/(10)=5(3)/(10)`

Other method.

Convert the mixed numbers to the decimal:

`AB=1(3)/(4)\ cm=1.75\ cm\\\\BC=1(1)/(10)\ cm=1.1\ cm\\\\AE+DC=1(1)/(5)\ cm=1.2\ cm\\\\DE=1(1)/(4)\ cm=1.25\ cm\\\\P=1.75+1.1+1.2+1.25=5.3\ cm`