Measure of arc DB = 58°. So ∠ C = 58° : 2 = 29° Let`s look at the triangle: Δ GBC. GB is a tangent. 29° + 90° + y = 180° y = 180° - 90° - 29° = 61° Then ∠ B = 30° : 2 = 15° In a triangle ΔADC : ∠ A = 180° - ( 29° + 15° ) = 180° - 44° = 136° x = 180° - 136° = 44° Answer: x = 44°, y = 61°
