1. Warm Up
Which of these quadrilaterals would fit the definition of a parallelogram?
Rhombus
Trapezoid
Rectangle
Kite
All these quadrilaterals have 2 pairs of congruent sides except…
Parallelogram

2. Circles
Section 1.7

3. Basic Understanding Center – The point in the center of the circle
Radius – The distance from the center of the circle to any point on the circle

4. Defining Circle Terms Investigation – page 70 Define the three terms
Chord – A line segment whose endpoints lie on the circle
Diameter – A chord that passes through the center of the circle
Tangent – A line that intersects the circle only once

5. More Definitions
Congruent Circles – Two or more circles that are congruent
Concentric Circles – Two or more coplanar circles share the same
center
Arc – A portion of the circumference of a
circle. Arcs have 2 endpoints

6. Arcs
Semicircle – An arc whose endpoints are the endpoints of the diameter
Minor Arc – An arc smaller than a semicircle
Major Arc – An arc larger than a semicircle

7. Measure
Arc measure of a full circle is 360 degrees, a semicircles arc measure is 180 degrees, and so on.
Arc Measure – Same as the measure of the central angle
Central Angle – An angle with its vertex at the center of a circle

8. Notation
How to show arc measure, notation, and identify between minor and major arcs

9. Homework Pg 72 #1-15 (skip 12), 19-37 (odd)
Homework check soon. Be ready!