EE-Learning
Angles in a triangle sum to 180° proof
Catogry:
Math
Subject:
Geometry
Course:
Geometry Foundations
Lecture List
Surface area using a net: rectangular prism
Intro to nets of polyhedra
Area of a circle intuition
Radius & diameter from circumference
Area of a circle
Radius, diameter, circumference & π
Challenge problems: perimeter & area
Perimeter & area of composite shapes
Area of composite shapes
Area of a quadrilateral on a grid
Area of a triangle on a grid
Area of kites
Area of trapezoids
Area of a parallelogram
Area of a triangle
Perimeter & area
Proof: Opposite angles of a parallelogram
Proof: Opposite sides of a parallelogram
Quadrilateral types
Kites as a geometric shape
Quadrilateral properties
Intro to quadrilateral
Triangle inequality theorem
Sum of the exterior angles of a polygon
Sum of interior angles of a polygon
Triangle angle challenge problem 2
Worked example: Triangle angles (diagram)
Worked example: Triangle angles (diagram)
Worked example: Triangle angles (intersecting lines)
Triangle exterior angle example
Angles in a triangle sum to 180° proof
Proving angles are congruent
Measures of angles formed by a transversal
Missing angles with a transversal
Parallel & perpendicular lines
Angles, parallel lines, & transversals
Equation practice with supplementary angles
Equation practice with complementary angles
Complementary & supplementary angles
Equation practice with vertical angles
Vertical angles
Acute, right, & obtuse angles
Measuring angles using a protractor 2
Measuring angles using a protractor
Measuring angles in degrees
Geometric definitions example
Specifying planes in three dimensions
Lines, line segments, & rays
Terms & labels in geometry
Euclid as the father of geometry