Basic geometric FIGURES GEOMETRY Basic geometric FIGURES

line a straight path that goes infinitely in opposite directions

line segment a part of a line that has two endpoints

ray a part of a line that has one endpoint and goes without end in one direction

angle formed by two rays with the same endpoint

BASIC GEOMETRIC FIGURES Kinds of Angle

right angle an angle that measures 90° (ninety degrees)

acute angle an angle that measures less than 90° (ninety degrees)

obtuse angle an angle that measures more than 90° but less than 180°

straight angle an angle that measures exactly180°

BASIC GEOMETRIC FIGURES PAIRS OF LINES

parallel lines lines that never meet even if extended infinitely in opposite directions

intersecting lines lines that intersect at a common point

perpendicular lines lines that intersect at right angles

BASIC GEOMETRIC FIGURES PLANE FIGURES

CURVES

closed curves

POLYGONS triangle hexagon octagon square rectangle pentagon

POLYGON – a closed. plane figure that is. made up of three or POLYGON – a closed plane figure that is made up of three or more line segments

PARTS OF A POLYGON Sides Angles Vertex (pl. vertices) – the point where two sides meet

DIAGONAL – connects. two vertices of a. polygon that are not DIAGONAL – connects two vertices of a polygon that are not next to each other DIAGONAL

All sides are the same length All angles are the same size REGULAR POLYGONS All sides are the same length All angles are the same size

Polygon with three sides TRIANGLE Polygon with three sides

Polygon with four sides QUADRILATERAL Polygon with four sides

FAMILY OF QUADRILATERALS GENERAL QUADRILATERAL or TRAPEZIUM PARALLELOGRAM TRAPEZOID ISOSCELES TRAPEZOID NON-ISOSCELES TRAPEZOID RECTANGLE RHOMBUS SQUARE

QUADRILATERAL – a polygon with four sides,. four QUADRILATERAL – a polygon with four sides, four angles and four vertices PARALLELOGRAM – a quadrilateral that has two pairs of opposite sides that are parallel RECTANGLE – a parallelogram that has four right angles RHOMBUS – a parallelogram that has four equal sides SQUARE – a rectangle that has four equal sides – a rhombus that has four right angles

TRAPEZOID – a quadrilateral with one pair of opposite sides parallel ISOSCELES TRAPEZOID – a trapezoid with one pair of opposite sides equal NON-ISOSCELES TRAPEZOID – a trapezoid with no equal sides

PLANE FIGURES KINDS OF TRIANGLE

ACCORDING TO ITS SIDES ISOSCELES TRIANGLE EQUILATERAL TRIANGLE SCALENE TRIANGLE

a triangle that has two equal sides ISOSCELES TRIANGLE a triangle that has two equal sides

a triangle that has three congruent sides EQUILATERAL TRIANGLE a triangle that has three congruent sides

a triangle that has no equal sides SCALENE TRIANGLE a triangle that has no equal sides

ACCORDING TO THE ANGLES ACUTE TRIANGLE RIGHT TRIANGLE OBTUSE TRIANGLE EQUIANGULAR TRIANGLE

a triangle with one right angle RIGHT TRIANGLE a triangle with one right angle

ACUTE TRIANGLE a triangle whose all angles are acute

a triangle with one obtuse angle OBTUSE TRIANGLE a triangle with one obtuse angle

a triangle that has 3 congruent angles (all angles measure 60°) EQUIANGULAR TRIANGLE a triangle that has 3 congruent angles (all angles measure 60°)

TESSELLATIONS

SLIDE

FLIP

TURN

SYMMETRY

SOLID FIGURES

DIMENSIONS OF A SOLID FIGURE LENGTH HEIGHT WIDTH

PARTS OF A SOLID FIGURE EDGE FACE VERTEX

CYLINDER A cylinder has two equal circular bases that are parallel

PRISM a figure made of two parallel faces that are polygons of the same shape and sides that are parallelograms.

RECTANGULAR PRISM A prism with rectangular faces

A prism with square faces CUBE A prism with square faces

SPHERE a figure with a curved surface in which all points on the surface are equidistant from the center a solid figure that is shaped like a round ball

PYRAMID A figure with a base that is a polygon and faces that are triangles

CONE A solid figure that has one circular face and one curved surface