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Transcript
Geometry Vocab Stephanie Jimenez Angle • The union of two rays having a common endpoint, the rays are the sides of the angle and the common endpoint is the vertex Dodecagon 24.08.2009 • A polygon having twelve sides • A dodecagon has twelve sides. Scalene Triangle 25.08.2009 • Triangle having no sides of the same length • They are three kinds of triangles: isosceles, scalene and…….. equal triangle. Concentric Circles 26.08.2009 • Circles having the same center but with different radii • Many concentric circles have a different radii. Postulate 27.08.2009 • A statement accepted as true without having to be proven to be true • He postulated that the circle was round. Hypotenuse 31.08.09 • The side opposite the right angle in a right triangle: the longest side of a right triangle Compass 1.09.09 • A construction tool used to draw arcs and circles Circle 3.09.09 • The set of all points in a plane that are equidistant from a given point known as the center of the circle • (x-h)2 + (y-k)2 =r2 Acute Angle • An angle having a measure greater that 0 degrees but less then 90 degrees Complementary Angles 9.9.09 • Two angles whose sum equals 90 degrees Diameter 9.10.09 • A chord that passes through the center of a circle Parallel Lines 11.09.09 • Coplanar lines that do not intersect Polygon 14.09.09 • A plane figure bounded by a number of line segments; the minimum number of sides is 3 Theorem 15.09.09 • A statement in math which must be proven to true Adjacent Angles 17.09.09 • Two angles having a common side and vertex but do not overlap; no common interior points Orthogonal • Intersecting of right angles 18.09.09 Hemisphere 21.09.09 • the surface bounded by half of a sphere and a plane through the center of the sphere Incenter 23.09.09 • the point of concurrency of the triangle’s angle bisectors KITE 24.09.09 • a quadrilateral in which two disjoint pairs of consecutive sides are congruent Collinear 25.09.09 • points that lie on the same line • A collinear line has points in it. Skew Lines 29.09.09 • lines that do nor intersect and are not coplanar Perpendicular Lines 30.09.09 • lines that intersect at right angles Transversal 01.10.09 • a line which intersects two or more coplanar lines in distinct points Obtuse Angle 02.10.09 • an angle having a measure greater than 90 degrees but les than 180 degrees Prism 05.10.09 • a polyhedron with two congruent faces, called bases, that lie in parallel planes; the other faces are called lateral faces Proof 06.10.09 • a convincing argument that shows why a statement is true Slant Height 08.10.09 • the height of a lateral face of a pyramid • the mouse ran up the slant height of the grain pile Circumference • the distance around a circle 09.10.09 Straightedge 12.10.09 • a construction tool used to draw segments: a ruler without marks Inscribed Angle 13.10.09 • an angle of a circle having its vertex on the circle and the sides of the angle are chords of the circle Isosceles Triangle 14.10.09 • a triangle with at least two congruent sides; equilateral triangles are isosceles Hypothesis 15.10.09 • the phrase following the word “if” in a conditional statement Octagon 16.10.09 • a polygon having eight sides • A stop sign is an octagon. Logic 19.10.09 • the analysis of the patterns of reasoning by which conclusions are validly derived from sets of premises Similar Figures 20.10.09 • figures that have the same shape • Similar figures have the same shape. Angle of depression 21.10.09 • an angle formed by a horizontal line and the line of sight to an object below the level of the horizontal Rhombus 10.22.09 • a quadrilateral with four equal sides • A kite is a rhombus. Rectangle 10.23.09 • parallelogram with 4 right angles • We found the area of the rectangle in class. Deductive Reasoning 26.10.09 • a process of reasoning logically from given facts to a conclusion Sector 27.10.09 • a region of a circle determined by two radii and a part of the circle Translation 28.10.09 • a transformation that moves points the same distance and in the same direction; a slide Heptagon 2.11.09 • a polygon having seven sides Interior Angle 3.11.09 • An angle whose sides are determined by two consecutive sides of a polygon Midpoint 4.11.09 • A point that divides a segment or an arc into two congruent parts Arc 5.11.09 • A figure consisting of two points on a circle and all points on the circle needed to connect them to a single part • A part of a circle Apothem 6.11.09 • A segment joining the center of a regular polygon to the midpoint of one of the polygon’s sides Tangent 9.11.09 • A line that intersects a circle at exactly one point Frustum 10.11.09 • The part of a solid cone or pyramid formed by cutting off the top by a plane parallel to the base Acute Triangle 11.11.09 • A triangle having three acute angles Corollary 13.11.09 • A statement that follows directly from another theorem and that can easily be proved from that theorem to be true