Jawaban:
B. 1900m²
Penjelasan dengan langkah-langkah:
= √50² - 40²
= √2500 - 1600
= √900
= 30m
b = 75 - 30
= 45
Luas Trapesium
L = 1/2 × (a + b) × t
= 1/2 × (75 + 45) × 40
= 1/2 × 120 × 40
= 1/2 × 4800
= 2400m²
Luas Persegi Panjang
L = p × l
= 25 × 20
= 500m²
Luas Keseluruhannya
Lt = Ltrapesium - Lpersegi panjang
= 2400m² - 500m²
= 1900m²
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Jawaban:
B. 1900m²
Penjelasan dengan langkah-langkah:
= √50² - 40²
= √2500 - 1600
= √900
= 30m
b = 75 - 30
= 45
Luas Trapesium
L = 1/2 × (a + b) × t
= 1/2 × (75 + 45) × 40
= 1/2 × 120 × 40
= 1/2 × 4800
= 2400m²
Luas Persegi Panjang
L = p × l
= 25 × 20
= 500m²
Luas Keseluruhannya
Lt = Ltrapesium - Lpersegi panjang
= 2400m² - 500m²
= 1900m²