Length: 0:28Radius and DiameterThe radius is 4 cm. How long is the diameter?Grade 4Learning video 60 · Geometry
Parallel and Perpendicular
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Parallel lines are the same distance apart everywhere. They never meet.
Perpendicular lines meet at a right angle.
In a rectangle, the top side is parallel to the bottom side.
How many pairs of parallel sides does a rectangle have?
Answer and working
Correct! 2 pairs: top and bottom, left and right.
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