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Geometry Resources Wall
This wall has all sorts of useful Geometry information about Polygons, Quadrilaterals, and Triangles.
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Click "View" to see a web page all about Quadrilaterals.
Types of Quadrilaterals we need to know are these four sided figures:
A 5 minute YouTube video on solving connected SIMILAR TRIANGLES.
Triangles in Patchwork Quilting Embroidery.
Triangles in Modern Art.
Here is a PowerPoint with Sound that goes through the main Polygon shapes.
Use "Page Down" key to advance each slide.
Here is a Powerpoint on Polygons (that has sound).
Turn your speakers on, and use the "Page Down" key to go forward.
The Web Page link below shows examples of POLYGON ANGLES using the (n-2)x180 formula, and also has the names of most Polygons.
Here are some interesting triangles present in Crystals and jewelry.
The following Powerpoint covers polygon definitions, Triangles, Quadrilaterals, and all other shapes as well. (Use "Page-Down" key) to do the slides.
Names of Polygons and Example of INTERIOR ANGLE SUM for any polygon = (n-2)x180 where n = no of sides.
INTERIOR ANGLES OF POLYGONS - The web page link below explains where the (n-2) x 180 formula comes from.
Triangles and Angles are important in studying Biomechanics, Robotics, and Human Movement in Sports.
Here is an XLS spreadsheet that has been programmed to help identify Triangle Types. Give it a Try and see how you go.
Triangles provide great strength to the roll cages of Rally and Racing Cars.
Triangles are a very important structural component in the design and building of Bridges.
CONGRUENT Triangles have all sides equal, and all three angles identical. This is shown in the diagram below.
Polygon Types - The birth of the "Rhombus" :)
An interesting set of Triangle Types :)
The following YouTube video is on Similar Triangles Problem Solving, and goes for around 5 minutes.
The following 3 minute YouTube video explains Similar Triangles and finding corresponding SIDES on them.
The following 3 minute YouTube video explains Similar Triangles and finding corresponding ANGLES in them.
Here is a PowerPoint on QUADRILATERALS and Angles from "Monica". Use the "Page-Up" and "Page-Down" keys to go back to slides, if you need to stop the animation.
Parallel Lines and their Angles. YouTube video 10 minutes.
Complementary and Supplementary Angles You Tube Video - 9 minutes.
Here is some end of University Level information about Triangle Properties.
This will definitely NOT be on our Test !!
Here is a 2 minute YouTube of an Algebra Alternate angles problem.
The following is a web Slideshare Presentation on Angles and Parallel Lines.
Find and Click on "Get File" then "open", because Sshare is not ok in the wall.
The web page below, has an interactive setup, where we can click on Parallel Lines and see the Angles click on "interactive" at top to find a full size version.
Similar Triangles - Pt2
10 minute YouTube Video
Similar Triangles - Pt1
10 minute YouTube Video
This might not teach that much Geometry, but could be good for a laugh or two. Video links to YouTube and is 6 mins 30 secs long.
Here is a PowerPoint on Triangles and Polygons from "Mrs Martin". Use the "Page-Up" and "Page-Down" keys to go back to slides, if you need to stop the animation
Angles in Parallel Lines -Pt2
The webpage link here has the remaining angle types:
Angles in Parallel Lines -Pt1
The webpage link here has some of the angle types:
Note that "Congruent" means the angles are the exact same size in degrees
Triangles can be classified by either their SIDES or by their ANGLES.
There are four main types of Triangles: Isosceles, Scalene, Equilateral, and Right Angled.