Geometry formulas

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formulas that wont be on the formula sheet 😵‍💫

Math

IGCSE Maths: Extended

CIE

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14 Terms

1
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<p>Circumference</p>

Circumference

2πr or πd

2
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<p>Arc length</p>

Arc length

(ø/360)x 2πr

3
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<p>Area of a rectangle </p>

Area of a rectangle

Base x Height

4
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<p>Area of a triangle</p>

Area of a triangle

½ base x Height

5
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<p>Area of a parallelogram</p>

Area of a parallelogram

Base x Height

6
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<p>Area of a trapezium </p>

Area of a trapezium

(a+b/ 2) x Height

7
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<p>Area of a circle </p>

Area of a circle

πr²

8
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<p>Area of a sector </p>

Area of a sector

(ø/360) x πr²

9
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<p>Surface area </p>

Surface area

Sum of area of all faces

10
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<p>Surface area of open or solid cylinder </p>

Surface area of open or solid cylinder

Formula in sheet + Area of 1 or 2 circles (according to number of ends)

11
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<p>Surface area of solid cone </p>

Surface area of solid cone

Formula in sheet + Area of 1 circle

12
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<p>Volume</p>

Volume

Length + width + height

13
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<p>Volume of solid with uniform cross-section</p>

Volume of solid with uniform cross-section

Area of cross section x Length

14
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Density

Mass ÷ Volume

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