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Home > Maths I > Measure and Shape > Angle and line facts

Maths I

Angle and line facts

Angles made by parallel lines

Three identical arrowheads pointing to the right. The two at the back are closer together than the one at the front.

In this section, the symbols above are used in diagrams to show that lines are parallel.

 

Corresponding angles

The two angles marked in this diagram are called corresponding angles and are equal to each other.

Two parellel straight lines, with a straight line that intersects them at an angle. The two acute angles that form on top of the parallel lines are marked as being identical.

Alternate angles

The two angles marked in this diagram are called alternate angles or Z angles and are equal to each other.

Two parallel lines with a straight line angled between each end of them, forming a z shape. The two angles inside the z are marked as being identical.

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