REVIEW

CLASSIFY EACH POLYGONS

• Triangle

• Quadrilateral

• Pentagon

• Hexagon

• Heptagon

• Octagon

REGULAR POLYGONS

•A regular polygon is a polygon with all sides equal in length and all angles equal in measure.

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.

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

Find the value of x in the pair of similar polygons.

15 cmx 6 cm

8 cm

10 cm

OR

10

615

x 106

15 x

15(10) = 6x 150 = 6x 25 cm = x

15(10) = 6x 150 = 6x 25 cm = x

Video

•Skills Check!When you finish turn your paper over and put it in the corner of your desk.

No Talking!