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Geometry . By: Emily Spoden. Trapezoid. I’m a quadrangle that always has one pair of parallel lines. Rectangle. I’m a parallelogram with four right angles. I always have four sides and have two pairs of parallel lines. Pentagon. I am a polygon with 5 sides. Octagon .
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Geometry By: Emily Spoden
Trapezoid • I’m a quadrangle that always has one pair of parallel lines.
Rectangle • I’m a parallelogram with four right angles. • I always have four sides and have two pairs of parallel lines.
Pentagon • I am a polygon with 5 sides.
Octagon • I am a polygon with 8 sides.
Regular Polygons • I am a polygon whose sides are all the same length and angles are all equal.
Rhombus • A quadrangle whose sides are all the same length.
Ellipse • A circle with two focal points. All ellipses are ovals but not all ovals are ellipses.
Oval • An egg-shaped curved non-polygon.
Quadrangle (Quadrilateral) • I am a polygon that has four sides.
Parallelogram • I am a quadrilateral with two pairs of parallel lines. My opposite sides are congruent.
Scalene Triangle • I am a triangle with sides that are all different lengths. None of my angles are the same measure.
Right Angle • A 90° angle.
Isosceles Triangle • I am a triangle with at least two sides that are sides that are the same length. At least two of my angles have the same length.
Equilateral Triangle • I am a triangle with all the same size sides and all my angles are the same measure.
Geometric Solids • A 3-D shape, such as a prism, cylinder, cone, or sphere. It has a hollow inside despite its name.
Polyhedrons • I am a 3-D figure whose surfaces, or faces, are all formed by polygons and their interiors.
Cylinder • I am a 3-D shape with circular bases that are parallel and congruent and my side is rounded. I am shaped like a can.
Sphere • I am a 3-D circle.
Cone • I am a 3-D shape that has a circular base, curved surface and one vertex, called the apex.
Prism • I am a 3-D solid that has two parallel faces that are congruent polygons and all other faces are parallelograms.
Pyramid • I am a solid in which one face is any polygon and all the other faces are triangles that come together at a point called an apex.
Cube • I am a polyhedron with six square faces. I have eight vertices and twelve edges.
Circle • A set of points that is all the same distance from the center.
Diameter • A line segment that passes through the center of a circle or sphere. It is twice the length of the radius.
Circumference • The distance around a circle or sphere; the perimeter of a circle.
Radius • A line segment from the center of a circle or sphere to any point on the circle or sphere.
Parallel lines • Lines that never meet and the same distance apart. Parallel lines can be line segments, rays and lines.
Perpendicular Lines • Two lines meeting at a right angles. Limes, rays, line segments can be perpendicular.
Intersecting Lines • Meeting or crossing one another. Lines, line segments and rays can intersect.
Line of Symmetry • A line drawn through a figurethat divides it intoparts that lookEXACTLY the samebut facingopposite directions.
Perimeter • The distance around a 2-dimensional figure.
Area • The amount of space inside a closed boundary. It is measured in square inches or centimeters.
Congruent Shapes • Having exactly the same shape and size.
Similar Shapes • Having the exact same shape but not necessarily the same size.
Degree • A unit of measure for angles based on dividing a circle into 360 equal parts. ° Is used to represent degree. 180°
Acute Angle • An acute angle is an angle that is greater than 0° but less than 90°.
Obtuse Angle • An obtuse angle is an angle that is greater than 90° but less than 180°.
Straight Angle • An angle that measures 180°.
90° Angle • A right angle.
Reflex Angles • An angle that is greater than 180° and less than 360°.
Adjacent Angles • Angles that are next to each other; they have a common side, but no other overlap. They share a vertex.
Vertical Angles(opposite angles) • When two lines intersect, the angles that do not share a common side. Vertical angles have equal measures. They are opposite from each other.
Supplementary Angles • Two angles whose measures equal 180°.
Bar Graph • A graph that uses horizontal or vertical bars to represent data.
Mean • The sum of a set of numbers divided by the number of numbers in the set. The mean is often referred to as the average. 45+47+52+55+58+60+69=455 455/7=60 60 is the mean.
Maximum • The greatest number in a set of data. 12, 15, 21, 26, 30, 32, 34
Minimum • The smallest number in a set of data. 47, 45,34,58, 56, 67, 90, 78,
Mode • The value or values that occur most often in a set of data. 67, 69, 78, 45, 67, 58, 34, 53, 26
Median • The middle value in a set of data when the data is listed from smallest to largest. 56, 59, 64, 67, 68, 71, 73, 75, 80