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AB = 105/360 x 75,36 = 21,98 cm
2. Keliling = 2 x 22/7 x 10,5 = 66
AOB = 38,5 / 66 x 360 = 210 derajat
3. sudut AOC = 180 - 72 = 108
AC = 108/72 x 12 = 18 cm
4. 7x + 8x = 180 derajat
15x = 180 derajat
x = 12 derajat
Sudut AOC = 7x = 7 x 12 = 84 derajat
Keliling = 360/84 x 6,3 = 27 cm
5. ROS = 45 derajat
QOR = 90 - 45 = 45 derajat
a. <ROS : <QOR = 45 : 45 = 1 : 1
b. <POR = 90 + 45 = 135
QOR : POR = 45 : 135 = 1 : 3
c. POS = 180 derajat
POR : POS = 135 : 180 = 3 : 4