intro 350 50 2 Polygons in the Coordinate Plane with Hank Buckingham What is a polygon? Any 2-D shape 2-D shapes with curved edges and no gaps 2-D shapes with straight edges and no gaps Anything drawn in 2-D 2-D shapes with straight edges and no gaps reminder 350 50 2 When graphing, always go side-to-side before going up or down attention rectangle 350 40 8 If x-coordinates are the same, it's a vertical line. attention rectangle 350 40 8 If y-coordinates are the same, it's a horizontal line. attention rectangle 50 4 Since our shape is a rectangle, it makes sense that 2 pairs of segments are equal. reminder 350 40 8 Using a graph is an excellent way to check you work. Which quandrant is point R in? I II III IV II reminder 350 40 7 Same y-coordinate means horizontal segment. comment 2 16 16 180 180 15 I bet this took you half as long as it's taking me! reminder 380 50 2 Go ahead and find the answer, then check to see if it's correct. attention rectangle 130 500 145 240 5 22 The decimal goes 2 places in from the right because there are 2 numbers after the decimal in the multiplication problem.