1. Vertically Opposite Angles ©2009 G Dear – Not to be sold/Free to use
Stage 4
Years 7 & 8
Angles
Vertically Opposite Angles
Angles.
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©2009 G Dear – Not to be sold/Free to use

2. Vertically Opposite (1/4)
Vertically Opposite Angles
are equal.
100o
80o
80o
80o = 80o
100o
100o = 100o
End of
Slide

3. Vertically Opposite (2/4)
Vertically Opposite Angles
are equal.
50o
130o
130o
130o = 130o
50o
50o = 50o
End of
Slide

4. Vertically Opposite (3/4)
Vertically Opposite Angles
are equal.
160o
20o
20o
20o = 20o
160o
160o = 160o
End of
Slide

5. Vertically Opposite (4/4)
Example 1: Find the value of the pronumeral.
po = 30o qo
30o
qo = 150o po
150o
Reason: Vertically Opposite
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Show