The Solar System

Triangle 3 sides3 anglesEach angle and each side do not have to be congruent. (on specific triangles)

Return to Main PageQuadrilateral4 sides4 anglesEach angle and each side do not have to be congruent. (On specific shapes)

Return to Main PagePentagon5 sides5 anglesInterior Angles of 108Exterior Angles of 72All sides are the same length (congruent) and all interior angles are the same size (congruent).Return to Main PageHexagon6 sides6 anglesInterior Angles of 120Exterior Angles of 60All sides are the same length (congruent) and all interior angles are the same size (congruent).

Return to Main PageHeptagon7 sides7 anglesInterior angles of 128.571 Exterior Angles of 51.429 All sides are the same length (congruent) and all interior angles are the same size (congruent).

Return to Main PageOctagon8 sides8 anglesInterior Angles of 135Exterior Angles of 45All sides are the same length (congruent) and all interior angles are the same size (congruent).

Return to Main PageDodecagon12 sides12 anglesInterior angles of 150Exterior Angles of 30 All sides are the same length (congruent) and all interior angles are the same size (congruent).

Return to Main PageWhat is a polygon?A plane figure with at least three straight sides and angles, and typically five or more.2-dimensional shapesStraight lines, and the shape is "closed" (all the lines connect up).

Return to Main PagePolygons in Real Life

Return to Main PageTypes of polygons: Simple or ComplexA simple polygon has only one boundary, and it doesn't cross over itself. A complex polygon intersects itself! Many rules about polygons don't work when it is complex.

Click here to see Regular or Irregular polygons!

Click here to see Concave or Convex polygons!

Return to Main PageMultiple Choice Question Draw a diagonal from B to D. Line BC measures 12m and line AB measure 4m. What is the area of right triangle ABD?

16 m^248 m^224 m^232 m^2Return to Main Page