Wednesday, February 20, 2013

1st Year Geometry

When two lines intersect the vertically opposite angles are always equal. 
Can you explain why this has to be true? 
Hint: the sum of the angles in a straight angle is 180˚. 

The angle animations are here here and two of them show vertically opposite angles.

There are more animations here for you to explore.

Word Search for Geometry
Solutions here.
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