Answer:
a)40°
b)25°
c)50°
d)82°
e)137°
Explanation:
angles in triangles always add to 180°
if there is a square in the triangle this means the angle is 90°
a)180°-80°-60°=40°
b)180°-75°-80°=25°
c)180°-40°-90°=50°
d)180°-51°-47°=82°
e)180°-18°-25°=137°