10 · Similarity & Congruence [PSC1] — printable QR sheet
7 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 7
10.1 — Proportions, Ratios & Similarity
Mild Medium Hot Spicy
Station code
e2977f3c
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/e2977f3c/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 2 of 7
10.2 — Triangle Similarity Shortcuts (SSS, SAS, AA)
Mild Medium Hot Spicy
Station code
a1a571ae
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/a1a571ae/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 3 of 7
10.3 — Parallel Lines in Triangles
Mild Medium Hot Spicy
Station code
545f5774
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/545f5774/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 4 of 7
10.4 — Indirect Measurement
Mild Medium Hot Spicy
Station code
2a0a16cd
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/2a0a16cd/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 5 of 7
10.5 — Corresponding Parts of Similar Triangles
Mild Medium Hot Spicy
Station code
43b83240
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/43b83240/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 6 of 7
10.6 — Similar Areas & Volumes
Mild Medium Hot Spicy
Station code
f00e4d65
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/f00e4d65/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 7 of 7
— Review (T10)
Mild Medium Hot Spicy
Station code
d6a7d5e4
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/d6a7d5e4/
Scan → work it on the whiteboard → type the answer → show the summary screen.