Areas of 2D and 3D Shapes Flashcards

1
Q

Circle

A

π × r^2

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2
Q

π × r^2

A

Circle

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3
Q

Triangle

A

½ × b × h

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4
Q

½ × b × h

A

Triangle

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5
Q

Parallelogram

A

b × h

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6
Q

b × h

A

Parallelogram

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7
Q

Trapezium

A

½(a+b) × h

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8
Q

½(a+b) × h

A

Trapezium

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9
Q

Ellipse

A

πab

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10
Q

πab

A

Ellipse

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11
Q

Surface area of a cube

A

6a^2

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12
Q

6a^2

A

Surface area of a cube

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13
Q

Rectangular prism

A

2(wl+hl+hw)

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14
Q

2(wl+hl+hw)

A

Rectangular prism

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15
Q

Cylinder

A

2πr(r + h)

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16
Q

2πr(r + h)

A

Cylinder

17
Q

Cone

A

πr(r + l)

18
Q

πr(r + l)

A

Cone

19
Q

Sphere

A

4πr^2

20
Q

4πr^2

A

Sphere

21
Q

Hemisphere

A

3πr^2

22
Q

3πr^2

A

Hemisphere

23
Q

Area of a sector

A

1/2 * r^2 * pheta

24
Q

1/2 * r^2 * pheta

A

Area of a sector

25
Q

Arc length of a sector

A

r * pheta

26
Q

r * pheta

A

Arc length of a sector

27
Q

Surface area of a 3d sector

A

2cross sectional area + 2side rectangles + 1 curved end rectangles

28
Q

2cross sectional area + 2side rectangles + 1 curved end rectangles

A

Surface area of a 3d sector