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EnVision Math 4th Grade > Topic 9 Geometry > Flashcards

Topic 9 Geometry Flashcards

1
Q

Quadrilateral

A

A polygon with four sides

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2
Q

Triangle

A

A polygon with three sides

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3
Q

Plane figure/shape

A

A figure/shape with only two dimensions

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4
Q

Line

A

A straight path of points that goes on forever in two directions

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5
Q

Point

A

An exact location in space

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6
Q

Plane

A

An endless flat surface

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7
Q

Acute angle

A

An angle that is less than 90 degrees

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8
Q

Obtuse angle

A

An angle that is more than 90 degrees

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9
Q

Right angle

A

An angle which measures 90 degrees

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10
Q

Parallel lines

A

In a plane, lines that never intersect

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11
Q

Perpendicular lines

A

Two intersecting lines that form right angles (square corners)

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12
Q

Parallelogram

A

A quadrilateral in which opposite sides are parallel

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13
Q

Pentagon

A

A plane figure with 5 sides

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14
Q

Acute triangle

A

A triangle with three acute angles

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15
Q

Angle

A

A figure formed by two rays that have the same endpoint

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16
Q

Equilateral triangle

A

A triangle in which all sides are the same length

17
Q

Hexagon

A

A polygon with 6 sides

18
Q

Intersecting lines

A

Lines that cross at one point

19
Q

Isosceles triangle

A

A triangle that has at least two equal sides

20
Q

Line segment

A

A part of a line that has two endpoints

21
Q

Obtuse triangle

A

A triangle in which there is one obtuse angle

22
Q

Octagon

A

A polygon with 8 sides

23
Q

Polygon

A

A closed plane figure/shape made up of line segments

24
Q

Protractor

A

A tool used to measure and draw angles

25
Q

Ray

A

Part of a line that has one endpoint and extends forever in only one direction

26
Q

Rectangle

A

A parallelogram with four right angles

27
Q

Rhombus

A

A parallelogram with all four sides congruent

28
Q

Right triangle

A

A triangle with one right angle

29
Q

Scalene triangle

A

A triangle in which no sides are the same length

30
Q

Side

A

Each of the line segments of a polygon

31
Q

Square

A

A quadrilateral with 4 right angles and all sides the same length

32
Q

Straight angle

A

An angle which measures 180 degrees

33
Q

Trapezoid

A

A quadrilateral with only one pair of opposite sides parallel

34
Q

Vertex

A

The point where two rays meet to form an angle; the pointed part of a cone; plural, vertices

35
Q

Vertices

A

The points where the sides of a polygon meet; the points where 3 or more edges meet in a solid figure; singular, vertex

36
Q

Degree

A

A unit of measure for angles

EnVision Math 4th Grade (1 decks)

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