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Semicircle Area = 39.2699081699

X = AB = 16

Blue Area = 8.48528137424

Radius R = 3.32820117735

Green R / Yellow R = 0.795317607

CD = 51 / 5 = 10.2

GH = 1.41421356237

Radius R = 2.5 = 5 / 2

X = CD = 19

2 [ BGLM ] / [ ABCDE ] = 3

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Shaded Area in Terms of R

Shaded Area = R ^ 2 / 4 

X = b - k = 108 - 9 = 99

Circle Radius R = 17

Elaborated

X = ABC = 30

Quarter Circle Radius R = 5

X = Angle ABC = 50

Triangle ABC Area = ?

X + Y + Z = 24.0701869231

X = AED = 165 / 2 = 82.5

X = A2 = 8

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Angle KCL = 45

X = DCF = 63

Rectangle DEFG Area = 200

X = ALD = 81

BC = 29 / 2 = 14.5

X = BC = 3.46410161514

X = BEF = 30

Volume of Coloured Lampshade

Blue Area = 26.6506350946

Shaded Area = R ^ 2 / 4

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ADF = Shaded Area = 1

[ABCDEF] / [1-1-1-Triangle] = 13

[ Blue Quadrilateral ] = 100

New / Elaborated

[ Green Triangle ] = 27 / 8 = 3.375

Green Area = 1.34378733978

X = CE = 15

X = ABC = 75 ( AC = BC = C1 )

[ Shaded Triangle ] = 9

X = CBL = 33

[ Red ] / [ Yellow ] = 2

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Pink Circle Area = 6.28318530718

X = AB = 13

X = BD = 20

R = 16. R1 = 9

X = ACD = 105

R / R1 = 3.51776695297

Triangle Hypotenuse = (1 + sqrt 5) k

X = FEG = 48

Angle EAF = 15

Green Area = 84 / 25 = 3.36