1. AB = DC, maka ….?

2. DC = 2×+4 dan × = 8, maka ….?

3. AB = CD = 20
BC = AD = 12, maka ….?

1. AB = DC, maka

$20 = 2 \times + 4 \\ 20 - 4 = 2 \times \\ 16 = 2 \times \\ \\ \frac{6}{2 } = \times \\ \times = 8$

2. DC = 2×+4 dan × = 8, maka

$dc = 2(8) + 4 \\ = 16 + 4 \\ dc = 20$

3. AB = CD = 20

BC = AD = 12, maka

$k = 2ab + 2bc \\ = 2 \times 20 + 2 \times 12 \\ = 40 + 24 \\ k = 64$

1. AB = DC, maka ….?, 2. DC = 2\xd7+4 dan \xd7 = 8, maka ….?, 3. AB = CD = 20, BC = AD = 12, maka ….?,