To solve this worksheet students should remember that a triangle is a right triangle if the sum of the squares of two smaller sides is equal to the square of the length of the longest side. Let the three sides of a triangle are the triangle are a, b, and c, where c is the longest side. If a^2+b^2=c^2, then the triangle is a right triangle, and if a^2+b^2≠c^2, then the triangle is not a right triangle.