Measuring Angles Classroom Math Presentation Colorful Bright Retro.pptx

presentation

1. MEASUREMENT and GEOMETRY

2. Students will be able to.... illustrate and describe point, line, ray, line segment, angle, and plane using models and geometric notations.

3. VOCABULARY

4. Point- It has no dimension and is usually represented by a dot.

5. Line- It is a set of connected points that extend infinitely in opposite directions.

6. Line Segment/Segment- It is formed when two distinct points are connected with a line.

7. Ray- A ray is a line that moves endlessly in one direction.

8. Plane- It is a flat surface that extends infinitely in all directions.

9. Angle - An angle is formed when two rays share a common end point.

10. MEASURING ANGLES

11. An angle is measured with reference to a circle with its center at the common endpoint of the rays. A circle equals 360°. Each one degree that is used to measure is a fraction of this.

12. The angle of a line is equal to 180°.

13. If you are given an angle of 30° you can find the missing angle (n) using addition. 30°+ n= 180° n = 150°

14. Using a Protractor- To use a protractor you line up your end point and bottom ray. Then you can find the degree of the angle by looking at the top ray.