Two Dimensional Shapes 3 rd Grade South Carolina

1. Two Dimensional Shapes3rd Grade South Carolina Standards addressed 3-4.2 Classify polygons as either triangles, quadrilaterals, pentagons, hexagons, or octagons according to the number of their sides. 3-4.3 Classify lines and line segments as either parallel, perpendicular or intersecting 3-4.4 Classify angles as either right, acute, or obtuse 3-4.6 Exemplify points, lines, line segments, rays, and angles. Amber Traverse

2. Do you know what each of these symbols represents? Move to the next slide to learn the vocabulary that goes along with each of these symbols. Amber Traverse

3. A Point is an exact position or location. For example, in this picture each student has an exact position. The boy in the orange shirt is third in the first row. What is the exact position of the girl with orange Hair and pig tails? http://school.discoveryeducation.com/clipart/clip/classhands.html Amber Traverse

4. A Line Segment For example, think about when we line up for recess. Each person is a point on the line. Student A and student B make a line segment. That part of the line begins at A and ends at B. A is straight is part of a line has two end points B C D E F G Amber Traverse

5. A line Take the motion of a ball. You push the ball, if there was no gravity that ball would continue on the path for an undetermined amount of time. is straight continues in both directions does not end Amber Traverse

6. A ray Pretend that you are in space and throw a ball from point A. Because there is no gravity that ball will continue in the direction thrown. is straight is part of a line has one end point continues on in one without ending Amber Traverse A

7. Test your vocabulary knowledge On your whiteboard/paper write the correct vocabulary word for each symbol. 1. 2. 3. 4. Amber Traverse

8. Types of anglesAnglesare made from two rays that share the same end point (known as the vertex). • An acute angle • measures less than 90 degrees • A right angle • measures exactly 90 degrees • it makes a square where the two • rays meet • An obtuse angle • measures greater than 80 degrees, but • less than 180 degrees Amber Traverse

9. Types of lines Parallel lines arelines that never touch. An example of these lines would be the roads that we drive on. Perpendicular lines are lines that cross over each other. Where the two lines meet right angles are formed. For example, where two roads meet at a light and cross over each other. Intersecting lines are Lines that cross over each other. Where the two lines meet acute and Obtuse angles are formed. Amber Traverse

10. Test your angle and line knowledgeAnswer each number by naming the angle or line represented on your paper/whiteboard. 1. 2. 3. 6. 4. 5. Amber Traverse

11. Polygons are • two dimensional figures that are closed • contain straight sides (no curves) • Contain the same number of angles as sides. Amber Traverse

12. Quadrilaterals Picture taken from: http://www.mathsisfun.com/quadrilaterals.html • are four sided figures • have exactly four angles Which of the following figures is not a quadrilateral? Amber Traverse

13. Triangles • are three sided figures • have exactly three angles • can be named either by their angles, sides, or both Which of the following is not a triangle? Amber Traverse

14. hexagon • Pentagons • are five sided figures • have exactly five angles • Octagons • are eight sided figures • Have exactly eight angles • Hexagons • Are six sided figures • Have exactly six angles pentagon octagon Amber Traverse

15. Polygon MasterpieceLook at the below picture made up of polygons; say the color then the name of the polygon. Amber Traverse

16. Works Cited Page Pierce, Rod. "Quadrilaterals - Square, Rectangle, Rhombus, Trapezoid, Parallelogram" Math Is Fun. Ed. Rod Pierce. 25 May 2011. 3 Jul 2011 http://www.mathsisfun.com/quadrilaterals.html ThinkCentral. Web. 02 July 2011. <https://www-k6.thinkcentral.com/ePC/viewResources.do?method=retrieveResources>. Amber Traverse