Pencil Angle

Author:John Golden

Slight generalization of a Brilliant.org problem. What will the angle between the pencils be if they are put together tightly tip to tip? (The original problem asked when both pencils were 30 degrees.)

New Resources

Dilation + Rotation of Pentagons
Set Operations (2 Sets)
apec
גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
Interactive Unit Circle - Exact Trig Values

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Applet
Polynom with tangent
square box
TRIAL2
Perpendicular radius and chord
Tangent to a Curve

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Sequences and Series
Reflection
Continuity
Fractal Geometry
Centroid or Barycenter