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a) KELILING = 5 + 20 + 10 + 5 + 5 + 15 = 60 cm

LUAS
Persegi panjang = p × l
= 20 × 5 = 100 cm^2

Persegi = s × s
= 5 × 5 = 25 cm^2

Seluruhnya = 100 + 25 = 125 cm^2

b) KELILING = 15 + 10 + 15 + 42 + 50 + 42 = 174 cm

LUAS
Persegi panjang = p × l
= 15 × 10 = 150 cm^2

Segitiga = 1/2 × a × t 》alas = 50 - 10 = 40
= 1/2 × 40 × 30 = 600 cm^2

Seluruh = 150 + 600 = 750 cm^2

semoga membantu