Math powerpoint presentation
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This document provides information about various tools used in geometry such as straightedges, rulers, compasses, and their uses. It explains that straightedges can be used to draw line segments and includes examples like rulers, cards, and notebooks. It describes how a compass is used to draw circles and arcs of a specified radius by opening the compass arms to the desired length and rotating one arm around the fixed point. Steps are provided for using a compass to draw a perfect circle and to construct an angle within a circle. It also defines a central angle as one formed by two radii intersecting at the center of a circle.
Math powerpoint presentation
- 3. Protractor
- 8. Tape Measure
- 9. Straight edge - A straightedge is any object that can be used to draw line segments by placing a pen or pencil against the object and tracing it alongside. For examples: •Ruler •ID Cards •Cardboard •Edge of the Notebooks •L square •T square •Triangles •And etc.
- 10. Draw a line that is 6cm long using a ruler Draw a ray that is 9cm long using a ruler
- 11. Compass
- 12. Compass- A compass is a kind of tool for drawing circles. By using a compass, we can draw a circle and an arc of specified radius. An arc is a part of the circumference of a circle
- 13. How to draw a perfect circle? How to draw a perfect circle?
- 14. Step 1: Open the arms of the compass to the desired length, it is best if its 3cm apart. Step 1: Open the arms of the compass to your desired length, it is best in 3cm.
- 15. Step 2: Fix the needle a point and rotate the other arm by a complete revolution/turn to draw a circle.
- 16. And now you have a perfect circle!
- 17. How to draw an angle inside a circle?
- 18. Step 1: From the circle, project a line from the center to any point of the circle.
- 19. Step 2: Using the projector, find the desired degree and project a line to the center, which is the vertex.
- 20. Central Angle
- 21. A central angle is an angle formed by two intersecting radii and the vertex in on the center of the circle.
- 23. Thank you for listening!