100 Facts Penguins- Arctic Birds, Cold Climate Wildlife, Educational Projects, Fun Activities,

100 Facts Penguins- Arctic Birds, Cold Climate Wildlife, Educational Projects, Fun Activities,

Matematika
Luas segitiga ADC adalah ....
A. 80 cm²
B. 120 cm²
C. 160 cm²
D. 240 cm²​


Luas segitiga ADC adalah ....
A. 80 cm²
B. 120 cm²
C. 160 cm²
D. 240 cm²​

`Segitiga

L∆ADC = ½ × AD × BC

= ½ × 8cm × 20cm

= 4cm × 20cm

= 80cm² (Opsi A)

L. ADC = L. ABC - L. DBC
L. ADC = (1/2 x (8 + 12 cm) x 20 cm) - (1/2 x 12 cm x 20 cm)
L. ADC = (1/2 x 20 cm x 20 cm) - (6 cm x 20 cm)
L. ADC = (10 cm x 20 cm) - 120 cm²
L. ADC = 200 cm² - 120 cm²
L. ADC = 80 cm² {A}






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