12-22 even.

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Feb 25th, 2015

exercise 12)

x = 720- 480 = 240

exercise 14)

x = 360 - 249 = 111

exercise 16)

2x = 360 -254 = 106

x = 53

exercise 18)

10 x = 180

x = 18 and 4x = 72

exercise 20)

6x = 720

x = 120 and external angle = 60

exercise 22)

6:10 = 12 : x

so x = 20

Feb 25th, 2015

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