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MathsIsFun.com
Geometry
Years 3 to 6
Plane Geometry
Circle
Congruent
Geometry - Reflection
Quadrilaterals - Square, Rectangle, Rhombus, Trapezoid, Parallelogram
Reflection Symmetry
Shapes Freeplay
Similar
Symmetry - Reflection and Rotation
Symmetry - Rotation
Symmetry Artist
Triangles - Equilateral, Isosceles and Scalene
2D Shapes - Polygons
Acute Angles
Angles - Acute, Obtuse, Straight and Right
Angles on a Straight Line Add to 180
Interactive Quadrilaterals
Line in Geometry
Obtuse Angle Examples
Parallel Lines
Perpendicular and Parallel
Polygons
Reflex Angles
Regular Polygons - Properties
Right Angles
Straight Angles
Using a Ruler and Drafting Triangle
Vertical Angles
Vertically Opposite Angles
Alien Mask From Coordinates
Cartesian Coordinates
Diplodocus Using Coordinates
Interactive Cartesian Coordinates
Interactive Triangles
Interior Angles
Interior Angles of Polygons
Proof that Triangles Contain 180 Degrees
Solving Triangles
What is a Plane?
Area Calculation Tool
Area of a Triangle without a Right Angle
Area of Circle, Triangle, Square, Rectangle, Parallelogram, Trapezium, Ellipse and Sector
Area of Irregular Polygons
Circle Sector and Segment
Coordinates and the 4 Quadrants
Heron's Formula
Tyrannosaurus Rex Picture by Plotting Coordinates
Solid Geometry
Cuboids, Rectangular Prisms and Cubes
Examples of Prisms
Polyhedron
Pyramids
Sphere
Spinning Cone
Spinning Cube (Hexahedron)
Spinning Cylinder
Torus
Spinning Icosahedron
Spinning Octahedron
Spinning Tetrahedron
Platonic Solids
Platonic Solids - Why Five?
Platonic Solids Construction Tips
Spinning Dodecahedron
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Volume of a Cuboid
Index by Year and Subject
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