2.Abcd = 360° = 123° + 90° + 2x + 5x
= 360 = 213 + 7x
7x = 360- 213
x = 21
sudut AQD = 5 x 21 = 105
sudut AQB = 2 x 21 = 42
3. 2a + 3a + 4a = 360
9a = 360
a = 360 : 9
= 40
sudut APB = 2 x 40 = 80
sudut BPC = 3 x 40 = 120
sudut CPA = 4 x 40 = 160
4. 6b + 3b = 180
9b = 180
b = 180:9
= 20
sudut AOB = 90
sudut BOC = 20 x 3 = 60
sudut COD = 90
sudut DOA = 20 x 6 = 120
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2.Abcd = 360° = 123° + 90° + 2x + 5x
= 360 = 213 + 7x
7x = 360- 213
x = 21
sudut AQD = 5 x 21 = 105
sudut AQB = 2 x 21 = 42
3. 2a + 3a + 4a = 360
9a = 360
a = 360 : 9
= 40
sudut APB = 2 x 40 = 80
sudut BPC = 3 x 40 = 120
sudut CPA = 4 x 40 = 160
4. 6b + 3b = 180
9b = 180
b = 180:9
= 20
sudut AOB = 90
sudut BOC = 20 x 3 = 60
sudut COD = 90
sudut DOA = 20 x 6 = 120