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Aleksandr [31]
4 years ago
6

Plz help I don’t understand

Mathematics
2 answers:
svlad2 [7]4 years ago
4 0
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
My name is Ann [436]4 years ago
3 0

9)

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

80° + y = 180°

y = 100°

10)

h + 130° = 180°     <em> they are a linear pair </em>

h = 50°

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====================================================

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The parenthesis are optional, but I find they're handy to count the '2's easier.

----------------

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