Home/Tag: Geometry
26 06, 2016

Similar Triangles

By |2016-10-21T13:17:02+10:00June 26th, 2016|Tags: , , |0 Comments

Similar Triangles Equiangular Two angles of a triangle are equal to two angles of another triangle. Three Sides Three sides of a triangle are proportional to three sides of another triangle 2 Sides & Included Angle Two sides of a triangle are proportional to [...]

17 06, 2016

Circle Geometry

By |2016-10-24T07:25:42+10:00June 17th, 2016|Tags: , , |0 Comments

Circle Geometry Go to the Circle Geometry Forum to see more questions or ask your own Topics Covered in Circle Geometry Parts Of A Cirlce Arcs, Angles & Chords Chord Properties Concyclic Points Tangent Properties Formulas Used in Circle Geometry [...]

11 06, 2016

Congruent Triangles

By |2016-11-12T12:13:29+10:00June 11th, 2016|Tags: , , |0 Comments

Congruent Triangles SSS Side Side Side All three sides of one triangle are equal to three sides of the other triangle SAS Side Angle Side Sides about equal angle in one triangle equal to sides about same angle in second triangle AAS Angle Angle  Side Two angles [...]

8 06, 2016

Interior Angle of Polygon

By |2016-10-21T13:17:03+10:00June 8th, 2016|Tags: , , , , |0 Comments

Interior Angle of Polygon $$interior\;\angle =\frac{180(n-2)}{n}$$ worked examples Find size if the angle in a regular octagon. $$\angle =\frac{180(8-2)}{8}$$ $$\angle =\frac{1080}{8}$$ = 135° octagon has 6 sides substitute n = 8 into formula $$\angle =\frac{180(n-2)}{n}$$ further examples harder examples How many sides does [...]

8 06, 2016

Similar Triangle Ratios

By |2016-10-21T13:17:03+10:00June 8th, 2016|Tags: , , |0 Comments

Similar Triangle Ratios the scale factor is what you need to times the side in the first triangle to get the number in the second triangle scale factors can be expressed in two ways Going from first triangle to second: $$\frac{b}{a}$$ or going from second triangle to first: $$\frac{a}{b}$$ [...]

24 08, 2015

Shapes

By |2016-10-21T13:17:10+10:00August 24th, 2015|Tags: , , |0 Comments

Shapes Square 4 sides all sides equal opposite sides parallel 4 vertices 4 axes of symmetry angle sum 360° diagonals bisect at 90° diagonals equal Rectangle 4 sides (quadrilateral) opposite sides equal opposite sides parallel 4 vertices 2 axes of symmetry angle sum 360° diagonals bisect each [...]

24 08, 2015

Parallel Lines

By |2016-10-21T13:17:10+10:00August 24th, 2015|Tags: , , , |0 Comments

Parallel Lines Parallel lines are two lines that are always equal in distance from each other and will never touch. If lines are parallel, this is indicated by arrows, or double arrows. The transversal is the line that cuts through the parallel lines [...]

24 08, 2015

Diagonals of Polygon

By |2016-10-21T13:17:10+10:00August 24th, 2015|Tags: , , , |0 Comments

Diagonals of Polygon $$d=\frac{n(n-3)}{2}$$ worked examples Find the number of diagonals in a hexagon. $$d=\frac{6(6-3)}{2}$$ = 9 hexagon has 6 sides substitute n = 6 Find the number of diagonals in a decagon. $$d=\frac{10(10-3)}{2}$$ = 35 decagon has 10 sides substitute n = 6 further examples [...]