Kites
- Parallelogram habits on a kite — 3 tasks
- Two points on one perpendicular bisector — 3 tasks
- The diagonal that bisects — 3 tasks
- Which pair of angles is congruent — 3 tasks
- Boundary cases: rhombuses and darts — 6 tasks
- Practice — 23 tasks
- Summary — 2 tasks
- Cool-down — 3 tasks
Classroom activities
Things a class does rather than writes on. Each one is a finished PDF: print it, cut it up if it says so, and hand it round.
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Is It a Kite? — Cut & Glue Sort 25 minutes, including the cutting · 5 sheets
12 marked quadrilaterals (ticks and printed side lengths), sorted into "the marks prove it is a kite", "the numbers show it is not" and "cannot tell". A rhombus and a dart count as kites; equal sides across from each other do not. The last row holds shapes that look like kites but show only part of the definition.
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Which Diagonal Gets Cut in Half? Kites — Answer Maze 10–15 minutes · 4 sheets
8 boxes on one page, each a kite named in words. Some give two angles and ask for a third; others ask which diagonal is cut in half, or how long a piece of the main diagonal is. The wrong answers are the lesson's two big mistakes: taking the two angles on the main diagonal as the equal pair, and cutting the main diagonal in half. The row of box numbers at the foot is the check.
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Which Angles Must Match? Kites — Mystery Picture 25–35 minutes · 4 sheets
25 squares, each a kite or a near-kite with two opposite angles marked "?": fill the square only if the marks prove the two angles congruent. The angles the main diagonal misses are filled, and so is a rhombus; the two angles on the main diagonal stay white, and so do squares whose marks are not enough. When every square is right, a picture appears.
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Which Pair Matches? Which Half Is Cut? Kites — Scavenger Hunt a full class period · 13 sheets
16 cards around the room, each one tilted kite. Half the cards give two angles and ask for a third; half give the two diagonals and a piece, and ask for another piece. Taking the two ends of the main diagonal as the equal pair, or cutting the main diagonal in half, lands on a card that sends the group back, and a clean run is 8 lines on the record sheet.