jika trapesium ABCD dan DEFG sebangun tentukan :
-luas trapesium ABCD
-keliling gabungan
bantuin pake cara dong
-luas trapesium ABCD
-keliling gabungan
bantuin pake cara dong
Penjelasan dengan langkah-langkah:
• step 1: cari setiap sisi yg blm diketahui
6/10 = DE/25 = 12/BC = EF/15
6/10 = DE/25
6.25 = DE.10
150 = DE.10
DE = 150/10 = 15cm
15/25 = 12/BC
15.BC = 25.12
15.BC = 300
BC = 300/15 = 20cm
12/20 = EF/15
12.15 = EF.20
180 = EF.20
EF = 180/20 = 9cm
-jawaban 1
L ABCD = ½ × (a + b) × t
L ABCD = ½ × (20cm + 25cm) × 10cm
L ABCD = 225 cm²
-jawaban 2
K gab = 15cm + 19cm + 12cm + 9cm + 15cm + 10cm + 20cm
K gab = 100cm
[answer.2.content]
