1.4 - Perimeter, Area, and Classifying Polygons 2016mrurbanc.weebly.com/uploads/4/4/2/6/44267585/1.4_-_area... · 2018. 9. 11. · 1.4 Perimeter, Area, and Classifying Polygons 2016
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1.4 Perimeter, Area, and Classifying Polygons 2016
1
September 08, 2016
Mental Floss: (Part 1) Friday Sept 9th Mental Floss: (Part 2) Friday Sept 9th
1.4 Perimeter and Area in the Coordinate Plane
Lesson Objectives
• Classify polygons
• Find the perimeters and areas of polygons in the coordinate plane
What are Polygons?Polygons
Many Angles
Polygons have/are:
1.
2.
3.
4.
Polygons NOT Polygons
A
B
C
DE
Side
Vertex C
• Segments
Polygon ABCDE• Must name polygon by vertices (letters) in order around the shape
• May start at any point• May go CW or CCW around polygon
• Points• Plural is "vertices"
Interior(Inside)
Exterior(Outside)
Naming PolygonsConvex or Concave?
Polygons can also be classified as either convex or concave.
Convex• No interior angles larger than 1800• No line that contains a side of the polygon passes through the interior
Concave• 1 or more interior angle is larger than 1800• 1 or more line containing a side passes through the interior• Has a "cave" in it, or it bends in on itself
1.4 Perimeter, Area, and Classifying Polygons 2016
2
September 08, 2016
# of Sides Polygon Name
3
4
56
78
9
10
12
15
n
1.4 p.34• #1,36,9,12,14,17,18,21,22,30,32 • Due Monday 9/12
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