Vocabulary (Basic Geometry)
English terms related to Basic Geometry:
The basics
The basics
- Point.
- Line.
- Ray.
- Line segment.
Lines
Lines
- Parallel lines.
- Intersecting lines.
- Perpendicular lines.
Angles
Angles
- Vertex.
- Sides.
- Acute angle.
- Right angle.
- Obtuse angle.
- Stright angle.
- Reflex angle.
- Complementary angles.
- Suplementary angles.
- Degree.
- Opposite angles.
- Congruent angles.
Circle and circumference
Circle and circumference
- Centre.
- Radius.
- Diametre.
- Arc.
- Chord.
- Central angle.
- Inscribed angle.
- Tangent line.
- Intersecting line.
- No intersection line or outside line.
Special lines
Special lines
- Perpendicular bisector.
- Angle bisector.
Geometric shapes
Geometric shapes
- Polygon: triangle, quadrilateral, pentagon, hexagon, heptagon, octogon, nonagon, decagon...
- Regular polygon.
- Vertices and sides.
Triangles
Triangles
- Types of triangles by angles:
- Acute triangle.
- Right triangle.
- Obtuse triangle.
- Types of triangles by sides:
- Equilateral triangle.
- Isosceles triangle.
- Scalene triangle.
Quadrilaterals
Quadrilaterals
- Square.
- Rectangle.
- Parallelogram.
- Rhombus.
- Kite.
- Trapezium.
Symmetry
Symmetry
- Symmetric shapes.
- Axis of symmetry.