Work out the value of x in a triangle July 8, 2019 16 32 64 128 Work out the value of x in a triangle calculator Work out the value of x in a right angled triangle How do you work out the value of x in a triangle In a right triangle one angle measures x° where sin ° = x 4 5 . what is cos(90° − °) x How to length of triangle How to find the sides of a triangle