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lesliekolleroxrkcf
50+30+y make a straight line so they have to add to 180. 180-50-30=100, y=100

h and 130 also make a line and so add to 180 so h had to be 50
tramserran

9)

30° + y + 50°  = 180°    they create a straight angle/line

80° + y = 180°

y = 100°

10)

h + 130° = 180°     they are a linear pair

h = 50°

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