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Acute Lines that never intersect
Right An angle that is more than 180°, less than 360°
Obtuse An angle that is more than 0°, less than 90°
Straight Intersecting lines that form 90° angles
Reflex Measures exactly 90°
Parallel An angle that is more than 90°, less than 180°
Perpendicular Measures exactly 180°
find their partner.
Acute An angle that is more than 0°, less than 90°
Right Measures exactly 90°
Obtuse An angle that is more than 90°, less than 180°
Straight Measures exactly 180°
Reflex An angle that is more than 180°, less than 360°
Parallel Lines that never intersect
Perpendicular Intersecting lines that form 90° angles
An acute angle is an angle that is between 0° and 90°. Examples are 50°, 25° e.t.c
A right angle is formed when two lines that are perpendicular to each other intersect. The angle formed is exactly 90°.
An obtuse angle is an angle that is between 90° and 180°. Examples are 101°, 98.9°
A straight angle is an angle that is exactly 180°. It is sometimes called flat angle.
A reflex angle is an angle that is between 180° and 360°. Examples are 340°, 192°
A parallel angle is an angle formed by lines that never intersect.
A perpendicular angle is formed by lines that intersect by forming an angle of 90° to each other.