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Geometry

QuestionAnswer
sector A region of the circle bounded by two radii and an arc
major arc An arc that measures more than 180°
minor arc An arc that measures less than 180°
semicircle An arc that measures 180°
secant A line that intersects the circle at two points
tangent A line that intersects the circle at exactly one point
inscribed angle An angle whose vertex is on the circle; its measure is half of the central angle that forms the same arc
central angle An angle whose vertex is the center of the circle
diameter A chord that passes through the center
chord A line segment whose endpoints lie on the circle
radius A segment connecting the center to a point on the circle
Kite A quadrilateral with two pairs of adjacent congruent sides
Rhombus A parallelogram with four congruent sides
Trapezoid A quadrilateral with exactly one pair of parallel sides
Rectangle A parallelogram with four right angles
Square A parallelogram with four right angles and four congruent sides
Parallelogram A quadrilateral with two pairs of parallel sides
Scalene Triangles No sides are congruent
Isosceles triangles Two sides are congruent
Equilateral triangles All sides are congruent
Right angle an angle measure of 90°
Right triangle Has one right angle
Obtuse Triangles Has one obtuse angle
Acute Triangles All three angles are acute angles
Obtuse angle an angle measure greater than 90
Acute angle an angle measure less than 90
Corresponding Angles Pairs of angles that are congruent
Alternate Interior Angles Pairs of angles that are congruent and lie between the parallel lines
Alternate Exterior Angles Pairs of angles that are congruent and lie outside the parallel lines
Vertical Angles Opposite angles formed by intersecting lines, which are congruen
Linear Pair Angles that are adjacent and supplementary
Adjacent Angles Angles that share a common side
Supplementary Angles Two angles whose measures sum to 180
Complementary Angles Two angles whose measures sum to 90°
Straight angle An angle measure of 180°
Reflex angle An angle measure greater than 180° and less than 360°
Interior points All points in the plane between the two rays of an angle
Exterior points All points in the plane that are not part of the angle or its interior
Parallel Lines lines that extend in the same direction(s) and are the same distance apart
Perpendicular lines Lines that form 4 right angles
Created by: essaydoctor
 

 



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