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# EDU290-Shapes Powerpoint

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### EDU290-Shapes Powerpoint

1. 1. SHAPES!<br />Introduction to some basic polygons<br />
2. 2. What do you know already?<br />How many shapes can you think of off the top of your head?<br />Where have you seen these shapes before?<br />
3. 3. What is a polygon?<br />2 dimensional <br />Closed<br />Made of straight lines<br />Which of these are polygons?<br />No<br />Yes<br />No<br />
4. 4. Triangle<br />Any three sided polygon<br />Types of Triangles:<br />Acute<br />Obtuse<br />Right<br />Scalene<br />Isosceles<br />Equilateral<br />Lets learn about the different kinds<br />
5. 5. Looking at side lengths<br />Scalene <br />Isosceles<br />Two of the sides on the triangle are the same length<br />All three sides of the triangle are different length<br />Equilateral <br />All three sides of the triangle are equal<br />
6. 6. Looking at the angles<br />Acute<br />ALL of the angles in the triangle is acute (less than 90°)<br />Obtuse<br />One of the angles in the triangle is an obtuse angle (greater than 90°)<br />Right<br />There is one right angle (90°) in the triangle<br />
7. 7. Parallelogram<br />Four sided polygon<br />Opposite sides are parallel<br />
8. 8. Rectangle<br />Polygon<br />4 sides<br />4 right angles (90°)<br />Parallelogram<br />
9. 9. Square<br />Special type of rectangle<br />Four EQAUL sides<br />Four 90° angles<br />Parallelogram<br />
10. 10. Rhombus<br />Another parallelogram<br />Opposite sides are parallel<br />Four EQUAL sides<br />Which is a rhombus?<br />
11. 11. Trapezoid<br />Only one pair of opposite sides are parallel<br />Four sides<br />Polygon, but NOT a parallelogram<br />
12. 12. Pentagon<br />Polygon<br />5 sided<br />Regular Pentagon has 5 equal sides<br />Which on is the regular pentagon and which is just a pentagon?<br />
13. 13. Hexagon<br />http://minglearound.files.wordpress.com/2010/12/nuts-bolts-washers.jpg<br />Polygon<br />6 sided<br />Regular Hexagon has 6 sides of equal length<br />
14. 14. Octagon<br />Polygon<br />Eight sides<br />Regular octagon has 8 sides of equal length<br />Photo taken by Jillian Carey<br />
15. 15. Decagon<br />Polygon<br />Ten sided figure<br />Regular decagon has ten equal sides<br />Which one of these is the regular decagon?<br />