Corresponding parts of congruent figures
- Two texts, and the order that links them — 3 tasks
- The letters, and no picture at all — 3 tasks
- Six pairings, and where they come from — 6 tasks
- When the picture and the letters disagree — 3 tasks
- Going Deeper — 3 tasks
- Practice — 25 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.
-
Corresponding Parts of Congruent Figures — Cut & Glue Sort 25 minutes, with cutting · 5 sheets
12 claims about one unmarked drawing where two congruent triangles share a side. Correct partners, wrong partners, or an angle name that names no angle at all.
-
Corresponding Parts of Congruent Figures — Maze 10–15 minutes · 4 sheets
Eight boxes of congruence statements with no drawings: find a partner part, or pick the writing that says the same thing. Each wrong answer is one of the two classic mistakes and leads to a box that sends the student back.
-
Corresponding Parts of Congruent Figures — Mystery Picture 25–35 minutes · 4 sheets
25 squares, each a congruence statement and one claim with no drawing at all. Does the statement say the claim? Fill it or leave it white, and a picture appears.
-
Corresponding Parts of Congruent Figures — Scavenger Hunt a full class period · 13 sheets
16 cards around the room, each with two congruent triangles side by side, nothing marked, and a congruence statement. Three measures of one triangle are given and one of the other is asked. Matching corners by their place on the page lands on a card that sends the group back, and a clean run is 8 lines on the record sheet.