Some of the most important geometry proofs are demonstrated here. I will provide you with solid and thorough examples.
Area of shapes proofs
Proof of the area of a circle
Here, we prove that the area of a circle is pi × r2 by inscribing circles into polygons
Proof of the area of a triangle
A crystal clear proof of the area of a triangle. We will know why it makes sense to multiply the base by the height and divide the result by two.
Proof of the area of a parallelogram
Here, we prove that the area of a parallelogram is base times height by turning a parallelogram into a rectangle.
Proof of the area of a trapezoid
Here, we prove that the area of a trapezoid is the average of the two parallel bases times the height by turning a trapezoid into a rectangle.
Proofs related to triangles
Proof of the angle sum theorem
A crystal clear proof of the angle sum theorem.
Triangle inequality theorem proof
A crystal clear proof of the triangle inequality theorem.
Base angles theorem proof
A crystal clear proof of the base angles theorem.
Fun math game: Solve a math problem and then eat the math man
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