Some calculators even have a special mode for right triangle calculations, where you can enter the values of two sides or one side and one angle, and get the values of the other side and angle.

a_Tra(base1, base2, height) Geometric Area The area of a trapezoid a_Tri(base, height) Geometric Area The area of a triangle c_CirD(diameter) Geometric Circumference The circumference of a circle ...

Learn about three trigonometric ratios in similar right-angled triangles with this BBC Bitesize Maths article. For students between the ages of 11 and 14.