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### 38 Cards in this Set

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• Back
 exterior angle an angle formed by a side and an extension of an adjacent side remote interior angles the two nonadjacent angles of an exterior angle corollary a statement that follows directly from a theorem equilateral triangle a triangle whose sides are all congruent isosceles triangle a triangle with at least two congruent sides. scalene triangle a triangle with no congruent sides equilangular triangle a triangle whose angles are all congruent acute triangle a triangle with three acute angles right triangle a triangle that contains one right angle obtuse triangle a triangle with one obtuse angle polygon a closed plane figure with at least three sides triangle a polygon with three sides quadrilateral a polygon with four sides pentagon a polygon with five sides hexagon a polygon with six sides octagon a polygon with eight sides decagon a polygon with ten sides equilateral polygon a polygon whose sides are all congruent equiangular polygon a polygon whose angles are all congruent regular polygon a polygon that is both equilateral and equiangular parallelogram a quadrilateral with two pairs of parallel sides rhombus a parallelogram with four congruent sides rectangle a parallelogram with four right angles square a parallelogram with four congruent sides and four right angles kite a quadrilateral with two pairs of congruent adjacent sides and no opposite sides congruent trapezoid a quadrilateral with exactly one pair of parallel sides (the bases) isosceles trapezoid a trapezoid whose legs are congruent circle the set of all points in a plane that are a given distance, the radius, from a given point, the center central angle an angle whose vertex is the center of the circle congruent circles two circles with congruent radii congruent polygon two polygons that have corresponding sides and angles that are congruent arc part of a circle diameter a segment that contains the center of the circle and whose endpoints are on the circle Standard Form Ax+By=C Slope-Intercept Form y=Mx+b Point-Slope Form y-y1=m(x-x1) adjacent arcs arcs that are on the same circle and have exactly one point in common Formula for Slope (y2-y1) _______ X2-X1