1. Warm Up 01.09.12 Week 2

2. Re 1Give two names for the polygon: dodecagon concave

3. Section 6.1 Day 2 I will identify, name and describe polygons. Ex 1 Equilateral Polygon All sides must be congruent.

4. Ex 2 Equiangular Polygon All angles must be congruent.

5. Ex 3 Regular Polygon Must be equilateral and equiangular.

6. Diagonal of a polygon A segment that joins two non-consecutive vertices. Ex 4 consecutive

7. Quadrilateral Angles Ex 5

8. Quadrilateral Angles 180º 360º Ex 5

9. Interior Angles of a Quadrilateral Theorem The sum of the measures of the interior angles of a quadrilateral equals 360º. Theorem 6.1 1 2 3 4 m ∠ 1 + m ∠ 2 + m ∠ 3 + m ∠ 4 = 360º.

10. Ex 6 70 + 80 + 2x + x = 360 150 + 3x = 360 3x = 210 x = 70 70º 80º xº 2xº P Q R S 2xº = m ∠ P 2( 70 )º = m ∠ P 140º = m ∠ P What is m ∠ P ?

11. Textbook page 326, 27 - 51 All except #40.Assignment: ReviewA _________ of a polygon is a segment that joins two nonconsecutive vertices. 45º 120º 9xº 6xº P Q R S Do 1: What is the value of x?