Pythagorean Theorem quiz for students. This theory states that the base squared, plus the height squared is equal to the hypotenuse squared. Based on these values, the missing side of a right triangle can be found. Solving these problems warrant applying some skills in basic algebra entailing making a variable the subject of the formula. After making this entity the subject of the formula, find the square root of this entity. That will be the length of the missing side. Pythagoras theorem worksheets are present under the worksheets section and each sheet has an answer key attached on the 2nd page. This quiz is for 4th, 5th, 6th and 7th grade students.