Pointnya besar nih tolong jawab ya

Bismillahirrahmanirrahim.
Jawaban terlampir pada gambar:)

1.
Kars: 26cm + 26cm + 1/4KO + 26cm + 26cm + 1/4 KO

=4.26cm+1/2KO
=104cm + 44cm
=148cm

Lars: LP - 1/2 LO
=1600cm² - 308cm²
=1292cm²

2.
K: 14+14+14+1/2KO
=14×3+22
=42+22
=64cm

L: LP+1/2LO
=196cm + 77cm
=273cm²