Geometric Figures Review

Chapter 19Harcourt Math

Point

An exact position or location

Line

It continues in both directions and doesn’t end (arrows)

Line Segment

It is a part of a line and has 2 endpoints

Ray

A part of a line, with one endpoint, that is straight and continues in

one direction.

Angle

A figure formed by 2 rays or line segments that share an endpoint.

Right Angle

A special “L” shaped angle that forms a square corner; a right angle

measures 90°.

Acute Angle

An angle that has a measure less than a right angle.

Obtuse Angle

An angle that has a measure greater than a right angle

Intersecting Lines

Lines that cross

Parallel Lines

Lines that never cross; lines that are always the same distance apart.

                                                                       

Perpendicular Lines

Lines that intersect to form right angles

Polygon

A closed plane figure with straight sides that are line segments.

Equilateral Triangle

A triangle that has 3 equal sidesand 3 equal angles

Isosceles Triangle

A triangle that has two equal sides

Right Triangle

A triangle with one right angle

Quadrilateral

A four-sided polygon.

Parallelogram

A four-sided polygon with two pairs of parallel sides.

Rhombus

A quadrilateral with 2 pairs of parallel sides and 4 equal sides

Rectangle

A quadrilateral with 2 pairs of parallel sides, 2 pairs of equal sides,

and 4 right angles

Trapezoid

A four-sided polygon having exactly one pair of parallel sides.

Pentagon

A polygon with 5 sides and 5 angles

Hexagon

A polygon with 6 sides and 6 angles

Octagon

A polygon with 8 sides and 8 angles

Which term best describes the following figure?

An exact position or location

(a) point (b) ray (c) angle (d) line

Which term best describes the following figure?

(a) rectangle (b) rhombus (c) parallelogram (d) polygon

Which term best describes the following figure?

(a) acute angle (b) right angle (c) obtuse angle (d) parallel lines

Which term best describes the following figure?

(a) point (b) line (c) line segment (d) ray

Which term best describes the following figures?

(a) acute angles (b) right angles (c) obtuse angles (d) intersecting lines

Which term best describes the following figure?

A figure made of two rays that share the same endpoint.

(a) angle (b) line (c) square (d) polygon

Which term best describes the following figure?

Lines that never cross, they are always the same distance apart.

(a) intersecting lines (b) parallel lines (c) perpendicular lines (d) angles

Which term best describes the following figure?

Lines that intersect to form right angles.

(a) intersecting lines (b) parallel lines (c) perpendicular lines (d) angles

Which term best describes the following figure?

(a) quadrilateral (b) pentagon (c) hexagon (d) octagon

Which term best describes the following figure?

(a) quadrilateral (b) pentagon (c) hexagon (d) octagon

Which term best describes the following figure?

(a) parallelogram (b) polygon (c) rhombus (d) trapezoid

Which term best describes the following figures?

(a) pentagons (b) polygons (c) rhombuses (d) octagons

Which term best describes the following figures?

(a) equilateral triangles (b) right triangles (c) isosceles triangles (d) quadrilaterals