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Angle rules, fully draggable
Drag the orange points to explore each angle rule with live measurements.
Full
Compact
Super compact
Matching side ticks show equal line lengths.
Matching angle ticks show equal angles.
Angles around a point = 360°
- line
+ line
Angles on a straight line = 180°
Angles in a triangle = 180°
Equilateral
Isosceles
Scalene
Crossing line - opposite angles are equal
Parallel lines with a diagonal line - alternate angles are equal (Z rule)
Toggle Z overlay
Parallel lines with a diagonal line - corresponding angles are equal
Parallel lines with two diagonal lines
Show more angles
Angles in a quadrilateral = 360°
Split into triangles