concepts & formulas Flashcards

1
Q

Perimeter of any geometric figure

A

sum of the measure of its’s sides

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2
Q

area of a rectangle

A

length times width

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3
Q

circumference of a circle

A

π times diameter

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4
Q

diameter

A

2 times radius

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5
Q

area of a circle

A

π times R squared

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6
Q

area of a triangle

A

base * hight * 1/2

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7
Q

area of a parallelogram

A

base * hight

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8
Q

what is an equilateral triangle

A

3 equal sides and angles. each angle is 60 degrees.

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9
Q

Isosceles triangle

A

has 2 equal triangle & 2 equal sides

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10
Q

scalene triangle

A

each angle and sides aren’t equal

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11
Q

the sum of three angles is

A

180 degrees

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12
Q

right triangle

A

one angle his equal to 90 degrees

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13
Q

A rule about the triangle

A

sum of every 2 sides must be greater than the 3rd side

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14
Q

volume of a cylinder

A

π * R squared * H

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15
Q

volume of a prisim/box

A

length * width * hight

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16
Q

volume of cube

A

side * side * side

17
Q

Complimentary angles

A

2 angles that add up to a 90 degree

18
Q

supplementary angles

A

2 angles that add up to a 180 degree

19
Q

Hypotenuse

A

is the opposite side of the right angle

20
Q

Pythagorean theorem

A

a squared + b squared = c squared

21
Q

number of diagonals in a shape

A

n (n-3)/2

22
Q

sum of interior angles in a polygon

A

(n-2) * 180

23
Q

surface area of a rectangular prism

A

2(LW) + 2(LH) + 2(W*H)

24
Q

Volume of a sphere

A

4/3 π R cubed

25
Q

Surface area of a sphere

A

4 π R squared

26
Q

the area of a trapezoid

A

1/2 * h * (a + b)
where A & B are the 2 bases

27
Q

area of an equilateral triangle

A

(a squared * square root of 3)/4
Where is the side length