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
	../games/3d-blocks-count.html
	Volume of a Cuboid