Introduction In high school mathematics, we were taught to write proofs in two columns. There are some proofs however that are easier to understand if we use Algebra. The triangle angle sum theorem that I have posted yesterday can be proven algebraically. Its proof which I think is easier to understand is shown below. Theorem […]

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# Posts tagged with 'angle sum of triangles'

## The Triangle Angle Sum Theorem

Introduction One of the most elementary concepts we have learned about triangles in Geometry is the angle sum theorem. The theorem states that the sum the three interior angles of a triangle is . We can easily see this by duplicating or cutting the corners of a triangle and meeting the angles at a particular […]

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