patulong po thanks in advance ung maayos po kailangan ko na po ngayon pasahan na po namin bukas ehh

Answer:
Angle of each interior of square = 360°/4
Angle of each interior of square = 90°
Sum of all interior angles = (6-2)(180°)
Sum of all interior angles = 720°
Angle of each interior of decagon= (10-2)(180°)/10
Angle of each interior of decagon= 144°
Angle of each exterior angle = 360°/9
Angle of each exterior angle = 40°