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Math > Geometry > Flashcards

Geometry Flashcards

1
Q

Right Angle

A

EQUALS 90 degrees.

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2
Q

Acute Angle

A

LESS THAN 90 degrees.

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3
Q

Obtuse Angle

A

MORE THAN 90 degrees.

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4
Q

A square is…

A

A four sided figure with all sides equal in length.

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5
Q

A rectangle is…

A

A four sided figure with two length equals and two width equals.

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6
Q

The three angles inside a triangle…

A

Always equal 180 degrees, no matter what type of triangle!

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7
Q

A right triangle has…

A

One 90 degree corner.

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8
Q

An equalateral triangle…

A

Has all three sides equal and all three angles equal.

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9
Q

An isosceles triangle…

A

Has two sides the same length.

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10
Q

An acute triangle…

A

Has no angle 90 degrees or more.

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11
Q

An obtuse triangle…

A

Has one angle greater than 90 degrees.

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12
Q

A straight line is…

A

180 degrees

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13
Q

A circle is…

A

360 degrees

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14
Q

The diameter…

A

Is a line that divides a circle in half.

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15
Q

The radius…

A

Is a line that runs from the center of a circle, to the outside of a circle.

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16
Q

Perimeter

A

The around the outside of figure with straight sides.

17
Q

The perimeter formula is

A

P =2L + 2W

18
Q

The circumference of a circle…

A

Is the distance around the outside of a circle.

19
Q

The formula of the circumference of a circle is…

A

C- PI D (or) Pi times the diameter.

20
Q

What is Pi?

A

Pi (π), the 16th letter of the Greek alphabet, is used to represent the most widely known mathematical constant. By definition, pi is the ratio of the circumference of a circle to its diameter. In other words, pi equals the circumference divided by the diameter (π = c/d).

21
Q

Point

A

A location on an object or a position in space.

22
Q

Line

A

A connected set of points that extends without end in two directions.

23
Q

Line Segment

A

Two points (end points) and the straight path between them.

24
Q

Ray

A

Part of a line that extends in one direction.

Math (4 decks)

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