Polygons • Simple, • Closed figure • Made up of line segments
Types of Polygons Triangles three sides Quadrilaterals four sides
Pentagon five sides
Pentagon five sides Hexagon six sides Heptagon seven sides
Octagon eight sides
Octagon eight sides Nonagon nine sides Decagon ten sides
Review A polygon is a simple, closed, figure made up of line segments. A polygon is classified by the number of sides it has.
Regular Polygons • A regular polygon has all sides and all angles congruent. B A Which is a regular polygon?
Triangles • Triangles can be classified by their sides or by their angles.
Triangles Classifying triangles by the angles….
Classify Triangles by their angles • Acute • All angles are acute • Right • Contains one right angle • Obtuse • Contains one obtuse angle
TRIANGLES Classifying triangles by their sides…
TRIANGLES SCALENE ISOSCELES
TRIANGLES SCALENE ISOSCELES EQUILATERAL
Classify triangles by its sides • Scalene • No sides congruent • Isosceles • Two sides congruent • Equilateral • All sides congruent
WHAT IS A REGULAR TRIANGLE CALLED?
QUADRILATERALS SQUARES RECTANGLES
QUADRILATERALS SQUARES RECTANGLES PARALLELOGRAMS
WHAT ARE REGULAR QUADRILATER- ALS CALLED?