Using the Pythagorean Theorem: Diagonal of a Square

As an easy application of the Pythagorean Theorem, I show how to calculate the diagonal of a square when the side of the square is given. This video lesson suits best grades 7-8 or a pre-algebra course.

See also

Using the Pythagorean Theorem 1: area of an isosceles triangle - a video lesson
Using the Pythagorean Theorem 3: volume of a triangular prism - a video lesson
Using the Pythagorean Theorem 4: perimeter of a trapezoid - a video lesson

Math Mammoth Grade 7 curriculum (pre-algebra)

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