the value of x is 5. since the formula for the triangle is a^2 +b^2 = c^2, it thus becomes x^2 + 3^2=6^2 which can be simplified to x^2+9=36. comingi ng like terms you get x^2=25 then tou square ×^2 to get x. doing the same to 25 gives you 5 since 25 is a perfect square. x=5