Geometry Review 1.1 - 1.5 Flashcards

Vocabulary flashcards covering key terms and concepts from Sections 1.1 through 1.5 of Geometry Review.

Midpoint

A point on a line segment that divides the segment into two congruent parts.

Vertical Angles

A pair of opposite angles formed by two intersecting lines.

Obtuse Angle

An angle that measures greater than $90^\times$ degrees but less than $180^\times$ degrees.

Right Angle

An angle whose measure is exactly $90^\times$ degrees.

Complementary Angles

Two angles whose measures sum to $90^\times$ degrees.

Congruent Angles

Angles that have identical measures.

Linear Pair of Angles

A pair of adjacent angles whose non-common sides form a straight line.

Bisected Angle

An angle divided into two congruent angles by a line or ray.

Perpendicular Lines

Lines that intersect to form a right angle ($90^\times$ degrees).

Congruent Segments

Segments that have the exact same length.

Counterexample

A specific case or example that proves a general definition or statement to be false.

Concave Polygon

A polygon with at least one interior angle greater than $180^\times$ degrees or with points pointing inward.

Convex Polygon

A polygon in which all interior angles are less than $180^\times$ degrees and no line segment between two interior points goes outside the figure.

Equilateral Hexagon

A six-sided polygon in which all six sides are equal in length.