Types of Angles

Topic: Geometry

Angle Type Measure Example
Acute Less than 90° 45°
Right Exactly 90° 90°
Obtuse Between 90° and 180° 120°
Straight Exactly 180° 180°
Reflex Between 180° and 360° 270°

Geometry

Basic Mathematics

 What is Geometry? Basic Geometrical Terms Types of Angles Types of Triangles Quadrilaterals (4-sided shapes) Perimeter and Area Area – Space inside a shape 3D Shapes and Volume Lines and Angles Properties Circle Geometry Pythagoras Theorem Geometrical Constructions (Basics) Coordinate Geometry (Basics) Symmetry and Transformations Summary Table