🔺 Unlock the geometry of the ancients. Master the sine and cosine rules. A print-and-go escape room for GCSE 9th Grade. Students work as a team of surveyors racing to crack an Egyptian tomb's 4-digit lock by solving four themed non-right-triangle puzzles. What's inside • 19-slide PowerPoint that drives the classroom — setup → puzzle → reveal rhythm for each of four clues. • Three differentiated student sheets (support / standard / stretch) — same mechanic, same final answer, calibrated to three