right angle

acute angle

obtuse angle

straight angle

An angle that measures more than 90 degrees, but less than degrees 180 degrees.

An angle that measures 90 degrees.

An angle that measures less than 90 degrees.

An angle that measures 180 degrees.

An a angle that measures more than 90 degrees.

An angle that measures less than 90 degrees.

An angle that measures exactly 90 degrees.

An angle that measures 180 degrees.

180 degrees

140 degrees

40 degrees

90 degrees

159 $$\degree$$

161 $$\degree$$

19 $$\degree$$

21 $$\degree$$

78 degrees

102 degrees

118 degrees

82 degrees

54°

65°

128°

132º

65^o

75^o

115^o

125^o

50^o, acute

130^o, obtuse

125^o

115^o

75^o

65^o