November 21, 2016
7.3
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November 21, 2016
Convex Polygon: All interior angles are less than, or equal, to 1800
Concave Polygon: One or more interior angle(s) is greater than 1800
Diagonal: A line drawn from one vertex (corner) of a polygon to any
non-adjacent vertex.
Regular polygon: means polygon with equal sides lengths
Ex. 1 Determine the measure of each exterior angle in a
regular 11-sided polygon.
e
e
e
e
e
e
e
e
e
e
e
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Ex. 2 What is the total interior angles of a 10-sided polygon?
Ex. 3 Determine the measure of each interior angle in a
regular 15-sided polygon.
Ex. 4 Determine the value of x.
x
x + 20
x+5
x - 15
x - 10
x+6
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Ex. 5 The interior angles of a polygon add to 2160°.
How many sides does the polygon have?
7.3 Assignment: p.391 #1-3 (columns 1 & 2 of each), #3c, 9, 11, 20
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