**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