Evidence Room 1
The Symmetry Fold Lab
Folding Stage
Triangle
Symmetrical
Mirror Lines
1
Halves Match?
READY
Detective's Notes
If you fold a triangle straight down the middle from the top corner, both halves match!
Select a Shape
Show Line
Evidence Room 2
The Angle Detective
An angle forms wherever two lines meet at a point. Drag the glowing arm around the protractor — or use the slider — and watch the reading change live.
90°
Right Angle
1°90°179°
Acute Angle
Smaller than a right angle — less than 90°. Think of a slice of pizza!
Right Angle
Exactly 90°. Makes a perfect square corner, like the corner of a book.
Obtuse Angle
Bigger than a right angle — more than 90°. It opens up wide, like a reclining chair.
⭐ Score: 0
🔥 Streak: 0
🏆 Best: 0
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Geometry Detective
Great effort!
Symmetry & Angle Match
Tap a chip, then tap its matching card — or drag it into place.
Evidence Cards
Answer Chips
🎉
Case Closed!
You matched every card with its correct answer.