Review of Triangles
Definition of Triangle: A triangle is a closed figure formed by three segments joining three non-collinear points.
Properties of Triangles:
1. The interior angles of a triangle add up to 180 degrees. Why?
Classification of Triangles by Sides:
1. Equilateral Triangle:
Construction of an equilateral triangle: Use GSP and construct two circles with the same radius. Explain why this is an equilateral triangle.
2. Isoceles Triangle:
Construction of an Isoceles Triangle using the radii of a circle: Explain why this is an isoceles triangle.
3. Scalene Triangle: No congruent sides
Classification of Triangles by Angles:
1. Acute Triangle: 3 acute angles
2. Equiangular Triangle: 3 congruent angles.
3.Right Triangle:
