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©G Dear2008 – Not to be sold/Free to use Mathematic (HSC) Geometry Revision Stage 6 - Year 12 Press Ctrl-A ©G Dear2008 – Not to be sold/Free to use

Types of Triangles Based on Sides Based on Angles 1. Equilateral triangle. 1. Acute angled triangle. All angles equal (60O) All sides equal All angles acute 2. Isosceles triangle. 2. Right angled triangle. Two sides equal One angle 90o Two base-angles equal 3. Scalene triangle. 3. Obtuse angled triangle. No sides equal One Obtuse angle. No angles equal