Angles in parallel lines
One transversal, eight numbered angles, and the six relationships a child needs to read from it. The same diagram feeds every card, so position rather than a redrawn picture carries the rule.
Reference chart
Angles in parallel lines
One diagram, six relationships
The arrow marks say the two horizontal lines are parallel. Start with the numbered pair, then decide where the angles sit.
Four pairs are equal; two add to 180°. “Interior” means between the parallel lines. “Alternate” means opposite sides of the transversal.
What's on this chart
A pair of corresponding angles is easy only after the two matching corners have been found. Alternate angles sit on opposite sides of the transversal; co-interior angles stay between the parallel lines on the same side. Putting all six relationships around one numbered diagram makes those location words do real work instead of becoming slogans beside six unrelated drawings.
Why this chart helps
The arrow marks on the horizontal lines are essential. Corresponding and alternate angles are equal only when the lines are parallel, and a clean-looking diagram without the marks has not supplied that fact. The numbered wedges also remove the common ambiguity of a label floating between two angles: every pair on the cards points back to an exact region at an exact crossing.
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