Jika gambar belah ketupat ABCD.. Jika AD = (2x + 5), BC = (x + 7) , sudut BCD = 60⁰, maka tentukan nilai : a). Nilai x b). Panjang sisi AD c). Besar sudut BAD dan sudut ABC
annisasevara
A.) nilai x = 2x + 5 = x + 7 = 2x - x = 7-5 = 2 b.) panjang sisi AD = 2x + 5 = 2 x 2 + 5 = 9 c.) < BAD = 60° ( 30° + 30° + 30° ) < ABC = 120° ( 60° + 60° + 60° )
= 2x - x = 7-5
= 2
b.) panjang sisi AD = 2x + 5
= 2 x 2 + 5 = 9
c.) < BAD = 60° ( 30° + 30° + 30° )
< ABC = 120° ( 60° + 60° + 60° )