Question

How do you find the missing length of an isosceles triangle given Base = 20 Angle = 25?

Answer 1

B = C = 25 -> A = 90 - 50 = 40 deg

Use trig identity: `a/sin A = b/sin B`

`c = b = (a.sin B)sin A = (25)(0.42)/0.64 = 16.40`