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

Triangle Interior Angles: Quick Exploration
Chapter-13: Fitting curve to data (Cat)
Triangle Exterior Angles: Quick Exploration
Reflecting about Y = X and Y = -X (Ver 2)
Chapter-07: Change of basis

Discover Resources

Coxeter- Theorem 2.21
Engage NY Algebra Module 1 Lesson 3 Example 1
planilha
Two translations
Snowboard Jump: Quick Regression Exploration

Discover Topics

Integers
Trigonometric Functions
Linear Functions
Rational Numbers
Quadrilaterals