GEOMETRY BASIC GEOMETRIC FIGURES line a straight path
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 exactly 180°
BASIC GEOMETRIC FIGURES PAIRS OF LINES
parallel lines that never meet even if extended infinitely in opposite directions
intersecting lines that intersect at a common point
perpendicular 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 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 next to each other DIAGONAL
REGULAR POLYGONS All sides are the same length All angles are the same size
TRIANGLE Polygon with three sides
QUADRILATERAL Polygon with four sides
FAMILY OF QUADRILATERALS GENERAL QUADRILATERAL or TRAPEZIUM PARALLELOGRAM RECTANGLE RHOMBUS SQUARE TRAPEZOID ISOSCELES NON-ISOSCELES TRAPEZOID
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 EQUILATERAL TRIANGLE ISOSCELES TRIANGLE SCALENE TRIANGLE
ISOSCELES TRIANGLE a triangle that has two equal sides
EQUILATERAL TRIANGLE a triangle that has three congruent sides
SCALENE TRIANGLE a triangle that has no equal sides
ACCORDING TO THE ANGLES RIGHT TRIANGLE OBTUSE TRIANGLE ACUTE TRIANGLE EQUIANGULAR TRIANGLE
RIGHT TRIANGLE a triangle with one right angle
ACUTE TRIANGLE a triangle whose all angles are acute
OBTUSE TRIANGLE a triangle with one obtuse angle
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
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
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