13 · Triangle Proofs [LR3] — printable QR sheet
8 stations, one per page. Print (portrait), post one at each station.
Talk-it-through problems take any real attempt for credit; timed problems gate hint 2 at 30 s
and Reveal at 60 s past that.
Printer tip: Ctrl/Cmd-P → portrait → “Background graphics” on if you want the flavor colors.
Station 1 of 8
13.1 — Conditional Statements
Mild Medium Hot Spicy
Station code
b19262ea
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/b19262ea/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 2 of 8
13.2 — Shortcuts for Triangle Congruence
Mild Medium Hot Spicy
Station code
6e586042
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/6e586042/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 3 of 8
13.3 — Two-Column Proofs with Algebra
Mild Medium Hot Spicy
Station code
568b23ff
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/568b23ff/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 4 of 8
13.4 — Flowchart Proofs with Triangles
Mild Medium Hot Spicy
Station code
eca0a142
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/eca0a142/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 5 of 8
13.5 — Two-Column Proofs with Triangles
Mild Medium Hot Spicy
Station code
9904c9af
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/9904c9af/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 6 of 8
13.6 — Proofs with Corresponding Parts (CPCTC)
Mild Medium Hot Spicy
Station code
a86c1370
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/a86c1370/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 7 of 8
13.7 — Proofs of Definitions
Mild Medium Hot Spicy
Station code
71f70f47
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/71f70f47/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 8 of 8
— Review (T13)
Mild Medium Hot Spicy
Station code
281eb98f
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/281eb98f/
Scan → work it on the whiteboard → type the answer → show the summary screen.