File:Triangle-angles.svg - Wikimedia Commons

File:Triangle-obtuse.svg - Wikimedia Commons

File:Triangle - angles, vertices, sides.svg - Wikipedia

Regular Polygon: a polygon that is equiangular (all angles equal

File:Angle-angle triangle similarity.svg - Wikimedia Commons

Cherenkov Radiation: Investigating the Angle

File:Triangle-law-of-sines.svg - Wikimedia Commons

File:Triangle angles sum to 180 degrees.svg - alpha

File:Triangle-labels.svg - Wikimedia Commons

File:Moment of area of a triangle through the base.svg - Wikipedia

Offset Trigonometry

Fermat's right triangle theorem - Wikiwand

Geometrical Interpretation of Linear Regression in Machine

File:Triangle-thales-circle.svg - Wikimedia Commons