Geometry Flashcards

1
Q

What is a point?

A

A fixed location in space. It is named with a capital letter.

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2
Q

What is a line segment?

A

Part of a line between two endpoints

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3
Q

What are parallel lines?

A

Lines in the same plane that do not intersect

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4
Q

What are perpendicular lines?

A

Intersecting lines that form a right angle

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5
Q

What is a plane?

A

A flat surface that extends in all directions and is named by a lowercase letter

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6
Q

What is an angle?

A

Formed by two rays with the same endpoint

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7
Q

What is a vertex?

A

The endpoint in which two rays intersect

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8
Q

What is a ray?

A

Part of a line that has one endpoint and goes on without end in one direction

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9
Q

What is a degree?

A

The unit used to measure an angle

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10
Q

What is a pentomino?

A

Five equal squares arranged so that at least one whole side of each square is touching a whole side of another square

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11
Q

What is a triangle?

A

A plane that has three sides, vertices, and angles

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12
Q

What is an equilateral triangle?

A

A triangle that has three sides of equal lengths

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13
Q

What is an isosceles triangle?

A

At least has two sides of equal lengths

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14
Q

What is a scalene triangle?

A

Three sides of unequal length

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15
Q

What is a right triangle?

A

A triangle with one right 90° angle

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16
Q

What is an acute triangle?

A

A triangle that has three acute less than 90° angles

17
Q

What is an obtuse triangle?

A

A triangle that has one obtuse angle (greater than 90° but less than 180°)

18
Q

What is a polygon?

A

A closed plane figure with three or more sides

19
Q

What is a regular polygon?

A

A polygon with congruent sides and angles

20
Q

What is a quadrilateral?

A

A polygon with four sides