Math 6A, Lesson 13, Spring 2017, 5/21/2017

1. Quickly go through the quiz about percentages

2. Perpendicular Bisectors and Angle Bisectors

• Use of compass: center, radius, pin leg, and drawing leg
• To draw a circle
• To mark off or copy a line segment
• How to draw a perpendicular bisector of a line segment?
• Any point on the perpendicular bisector of a line segment is equidistant from the two end points of the segment.

3. Angle Bisectors

• A ray AZ divides <BAC into two equal angles, <BAZ and <CAZ. The ray is called the angle bisector of <ABC
• How to draw an angle bisector?
• Any point on the angle bisector of an angle is equidistant from the two sides of the angle.

4. Class work

• Construct/draw circles, triangles, angles, equal line segments
• construct /draw perpendicular bisectors of line segments
• construct/draw angle bisectors of angles

5. Home Work:

• Page 45, 46, and 47: 1, 2, 3, 4, 5, 6, 7, 8, 9
• Page 48, 49, 50, 51: 12, 13, 14, 15, 16, 17, 18, 19