1. Review

2. Classify each POLYGONS
Triangle
Quadrilateral
Pentagon
Hexagon
Heptagon
Octagon

3. Regular Polygons
A regular polygon is a polygon with all sides equal in length and all angles equal in measure.

4. Another Regular Polygon
A regular octagon has a total perimeter of 280 inches. Find the measure of each side of the polygon.
An octagon has 8 sides. Since it’s a regular octagon all of the sides are equal in length.
280 ÷ 8 = 35 inches
Each side measures 35 inches.

5. Naming congruent parts
Write a congruence statement.
Identify all parts of congruent corresponding parts.
∆DEF ≅ ∆IGH
Angles: D≅ I, E ≅ G, F ≅H
Sides DE ≅ IG, EF ≅ GH, FD ≅ HI

6. Video Find the value of x in the pair of similar polygons. 15(10) = 6x
10 cm
6 cm
15 cm
8 cm OR
Answer:
15(10) = 6x
150 = 6x
25 cm = x
15(10) = 6x
150 = 6x
25 cm = x
Video

7. Skills Check!
When you finish turn your paper over and put it in the corner of your desk.
No Talking!