Question

Jika luas bangun tersebut 12 cm² ,maka panjang BD adalah...

Answer 1

Verified answer

Luas persegi panjang = p× l
12 = p × 3
12 ÷ 3 = p
4 = p

panjang BD = √4² + 3² = √16 + 9 = √25 = 5 (C)

insyaallah ❤

Answer 2

Teorema Pythagoras

^ = pangkat

Luas persegi panjang = p x l
12 = AB x BC
12 = AB x 3
12/3 = AB
AB = 4 cm

BD^2 = AB^2 + BC^2
BD^2 = 4^2 + 3^2
BD^2 = 16 + 9
BD^2 = 25
BD = √25
BD = 5 cm

Jadi panjang BD adalah 5 cm (C).

*semoga membantu. sukses selalu ^_^