Keliling layang layang ABCD = 54cm, BC =17cm dan OA = 6cm. luas ABCD adalah
Jawaban Terkonfirmasi
BC = DC = 17
AB = AD = (54 – 2(17))/2 = 10 cm
OB = √10² – 6²
OB = √100 – 36
OB = √64
OB = 8
BD = 2 x 8 = 16
OC = √17² – 8²
OC = √289 – 64
OC = √225
OC = 15
AC = 15 + 6 = 21
Luas = 1/2 (21)(16)
= 168 cm²