Warm Up 01.09.12 Week 2. Re 1Give two names for the polygon: dodecagon concave.

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Presentation transcript:

Warm Up Week 2

Re 1Give two names for the polygon: dodecagon concave

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

Ex 2 Equiangular Polygon All angles must be congruent.

Ex 3 Regular Polygon Must be equilateral and equiangular.

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

Quadrilateral Angles Ex 5

Quadrilateral Angles 180º 360º Ex 5

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

Ex x + x = x = 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 ?

Textbook page 326, 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?