Shapes Flashcards

1
Q

Area for a trapezium

A

(a+b)/2xh

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2
Q

Circumference of circle

A

Pi x d

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3
Q

Area of circle

A

Pi x r^2

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4
Q

Sector of circle perimeter

A

Angle / 360 x (2 pi x r)

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5
Q

Area of sector of circle

A

Angle / 360 x (pi x r^2)

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6
Q

Circle arc length

A

L = angle/360 x (2 pi x r)

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7
Q

Surface area for cylinder

A

2 pi x r x (r x h)

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8
Q

Cable volume and surface area

A

a^3 and 6 x a^2

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9
Q

Cuboid volume

A

L x W x H

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10
Q

Cuboid surface area

A

2 (lw + wh + hl)

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11
Q

Volume for a cone

A

1/3 x pi x r^2 x h

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12
Q

Surface area for cone

A

Pi x r x l + pi x r^2

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13
Q

Sphere volume

A

4/3 x pi x r^3

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14
Q

Sphere surface area

A

4 pi x r^2

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15
Q

Isosceles triangle means

A

Two equal sides

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16
Q

Scalene triangle means

A

No equal sides

17
Q

Obtuse triangle means

A

Larger than 90 degree angle but less than 180

18
Q

Acute triangle means

A

Less than 90 degree angle

19
Q

Reflex angle

A

Larger than 180 but less than 360 degrees

20
Q

Complimentary angle

A

Adds to 90 degrees

21
Q

Supplementary angle

A

Adds to 180 degrees

22
Q

What is meant by similar triangle

A

A similar triangle is proportional to the other. Same angles

23
Q

What do all the exterior angles of a regular polygon add up to?

A

360

24
Q

What is an exterior angle?

A

Supplementary to interior angle (180)