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Geometry in the World Around You

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Savannah Blankenship

on 2 October 2012

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Transcript of Geometry in the World Around You

Geometry in the World Around You By Brad Woolery and Savannah Blankenship Patterns of flat shapes that fit perfectly together Tessellation A line which touches a circle or ellipse at just one point Tangent Line Line segments that never intersect but are on the same plane. Parallel Line Segments Lines segments that meet at a 90 degree angle. Perpendicular Line Segments A figure that matches itself a number of times while it is being turned about a point. Rotational Symmetry Figures that have the same shape but not necessarily the same size. Similar Solids/Figures A curved line that is part of the circumference of a circle. Arc Angles that share a common vertex and a common side but do not overlap. Adjacent Angles A line which divides the figure in two equal halves, such that one side of the figure exactly resembles another half Line of Reflection A triangle with its angles less than 90 degrees. Acute Triangle A triangle in which one of the angles is obtuse Obtuse Triangle A polygon with one or more interior angles greater than 180 degrees. Concave Polygon A triangle where two sides are equal. Isosceles Triangle A plane figure with four equal straight sides and four right angles Square A quadrilateral with four right angles. Rectangle A quadrilateral with two distinct pairs of adjacent sides that are congruent. Kite A quadrilateral with only one pair of parallel sides Trapezoid A polygon with five sides. Pentagon A polygon with six sides. Hexagon A polygon with eight sides. Octagon A polygon with all sides and all angles equal. Regular Polygon Figures having the same shape and measures. Congruent Figures A round plane figure with a boundary that consists of points equidistant from its center. Circle A solid round figure with every point on its surface equidistance from its center. Sphere Two or more circles having the same center. Concentric Circles A polyhedron consisting of two parallel congruent faces called bases. Prism A polyhedron with a polygonal base and triangles for sides. Pyramid A three-dimensional figure that has one circular base and one vertex. Cone A three-dimensional geometric figure that has two congruent and parallel bases. Cylinder Symmetrical - Made up of exactly similar parts facing each other or around an axis; showing symmetry. Symmetrical vs. Asymmetrical Asymmetrical - Having parts or aspects that are not equal or equivalent; Lacking symmetry Carpet samples at Lowe's A cup and pencil at Savannah's house Shelves at Lowe's Shelves at Lowe's A ceiling fan at Lowe's Duct tape at Lowe's Stove hood at Lowe's Shelves at Lowe's Padding on a washing machine at Lowe's A binder at Savannah's house Tile samples at Lowe's A door at Lowe's An ice chest at Lowe's A memory card at Savannah's house Carpet samples at Lowe's A stop sign on Savannah's street Tile samples at Lowe's Cabinet handles at Lowe's A lamp globe at Lowe's Paint buckets at Lowe's A box at Lowe's A dollar bill at Savannah's house A lighting fixture at Lowe's A water heater at Lowe's A sign at Lowe's A glove and dog shampoo at Lowe's Tile samples at Lowe's Coat hangers at Lowe's A music stand at Savannah's house A jewelry hanger at Savannah's house The End
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