Daily Warm-Up Find EF. Find the midpoint of the segment ED with endpoints E(8,-9) and D(0,5) Find the length of segment CF with endpoints C(4,6) and F(-4,-3).

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Presentation transcript:

Daily Warm-Up Find EF. Find the midpoint of the segment ED with endpoints E(8,-9) and D(0,5) Find the length of segment CF with endpoints C(4,6) and F(-4,-3). x+15 7x-3 E F M

Perimeter & Area in the Coordinate Plane 1.4

Core Concepts Polygon—a closed plane figure formed by three or more line segments called sides. Number of Sides Type of Polygon 3 Triangle 4 Quadrilateral 5 Pentagon 6 Hexagon 7 Heptagon 8 Octagon 9 Nonagon 10 Decagon 12 Dodecagon n n-gon

Core Concepts Polygon—a closed plane figure formed by three or more line segments called sides. Example 1: Triangle Decagon Quadrilateral 16-gon

Core Concepts Vertex— the point of intersection of two sides of a polygon. Convex—when no line that contains a side of the polygon contains a point in the interior of the polygon Concave—A polygon that is not convex.

Example 2 Concave Convex Convex Classify each polygon. (2) Name all the vertices for each polygon shown. (3) Determine whether the polygon is convex or concave. Hexagon dodecagon Octagon A, B, C, D, E, F A,B,C,D,E,F,G,H,I,J,K,L A,B,C,D,E,F,G,H Concave Convex Convex

Perimeter & Area Review Core Concepts Perimeter & Area Review Triangle

Perimeter & Area Review Core Concepts Perimeter & Area Review Square

Perimeter & Area Review Core Concepts Perimeter & Area Review Rectangle

Example 3 Find the perimeter & Area of with vertices A(-2,3), B(3,-3), & C(-2,-3).

You Try #1: Find the perimeter & Area of with vertices C(1,3), D(4,-3), & E(-4,-4)

Example 4 You are building a shed in your backyard. The diagram shows the 4 vertices of the shed. Each unit in the coordinate plane represents 1 foot. Find the area of the floor of the shed.