Diketahui: <a = 45° <b = 90° b = 4cmditanya: a=?

45/90 = a/4
90a = 180
a = 2cm

B/sin b = a/sin a
4/sin 90 = a/sin 45
4/1 = a 1/2 akar 2
a = 4*1/2 akar 2
a = 2 akar 2