Collection of lessons/tutorial guides/flash clips/math lessons on Plane Geometry (including trigonometry).*4**4**1*GENERAL*2*Plane*4*Geometric Symbols*4*Areas*4*Congruent*4*Pythagoras*apos* Theorem*4*Pythagorean Triples*4*Quadrilaterals - Rhombus, Parallelogram, etc*4*Right Angled Triangles*4*Shape*4*Similar*4*Triangles*4*Circle*4**4*Transversal*4**1*USING DRAFTING TOOLS - GEOMETRIC CONSTRUCTIONS*2**5*Animated demonstrations*6**4*Line Bisector*4*Angle Bisector*4*30 Degree Angle*4*45 Degree Angle*4*60 Degree Angle*4*Equilateral Triangle*4*Perpendicular to a Point on a Line*4*Perpendicular to a Point NOT on a Line*4*Parallel Line through a Point*4*Same (Congruent) Angle*4*Cut a line into N segments*4*Center of a Circle*4*Point to Tangents on a Circle*4*Inscribe a Circle in a Triangle*4*Circumscribe a Circle on a Triangle*4*Circle touching 3 Points*4*Pentagon*1*USING DRAFTING TOOLS - USING A PROTRACTOR*2**5*Animated demonstrations*6**4*Construct an Angle*4*Measuring*1*USING DRAFTING TOOLS - USING A RULER AND DRAFTING TRIANGLE *2**5*Animated demonstrations*6**4*Constructing Parallel Lines*4*Constructing Perpendicular Lines*1*USING DRAFTING TOOLS - USING A RULER AND COMPASS*2**4**5*Animated demonstrations*6**4*Constructing A Triangle With 3 Known Sides*4**1*AREA CALCULATION TOOL*2*Online/interactive tool to work out area for the following shapes in real time (including formulae).*4**4*Area of Triangle*4*Area of Rectangle*4*Area of Trapezoid (US) - Trapezium (UK)*4*Area of Ellipse*4*Area of Square*4*Area of Parallelogram*4*Area of Circle*4*Area of  Sector*1*TRANSFORMATIONS AND SYMMETRY*2*Transformations Index - rotation, reflection, translation*4*Symmetry Index - Reflection Symmetry, Rotational Symmetry, Point Symmetry*4*Symmetry Artist -  online graphics tool to create lines/objects and display real-time reflection/rotations about x-axis, y-axis*1*ANGLES*2*Degrees (Angle)*4*Acute Angles*4*Right Angles*4*Obtuse Angles*4*Straight Angle*4*Reflex Angles*4*Parallel Lines and Pairs of Angles*4*Proof that a Triangle has 180 degrees*4*Congruent Angles*4**4*Supplementary Angles*4*Complementary Angles*4**4*Angles Around a Point*4*Angles on a Straight Line*4**4*Interior Angles*4*Exterior Angles*4**4**1*TRIGONOMETRY*2*Sine, Cosine and Tangent*4*Sine Graph Exercise*4*Polar and Cartesian Coordinates*4*Unit Circle*4**4*Useful for teachers of Math/Mathematics.