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8th grade math worksheets

Need the right level, not just the grade label? Start wherever your child feels comfortable.

What to practice this year

The Pythagorean theorem is the year's centrepiece, and the direction matters. Finding the hypotenuse is an addition and a square root; finding a leg is a subtraction and a square root, and a child who has only practised the first will add when they should take away. Both directions get their own sheets here for that reason, and every triangle is built from a whole-number triple so the arithmetic never obscures the method.

Why these skills come next

Whole-number answers are what make the practice about the theorem. Built from any two legs, a right triangle almost never has a whole hypotenuse, and a sheet full of surds tests notation rather than method. Every triangle here comes from a Pythagorean triple, which is what a textbook does and for the same reason.

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The Pythagorean theorem

Both directions, with whole-number answers throughout.