Tolong Bantuin Jawab a,b,dan d dong please

A. <B = 180° - (30°+95°)
= 180° - 125°
= 55°
B. <M = 180° - (35°+20°)
= 180° - 55°
= 125°
C. <D = 180° - (100°+30°)
= 180° - 130°
= 50°
D. <R = 180° - (2×55°)
= 180° - 110°
= 70°