Top 10.762

X = CE = 13

X = 3

Ratio of Orange / Red = 2

Angle DCE = 30

X = CE = CT = AT = 13

Missing Angle GHO = 30

Yellow Triangle Area = 18

Another Approach

X = BC = 18

Solution = 0.841982852881

X = CAJ = CBD = 36

3 Circles ( Just for Fun )

Top 10.761

Blue / Red = 1.98427664860

BE = 1.25992104989

Green / Yellow = 1 / 1

Green / Orange = 13 / 19

X = ABD = 27

Blue Area = 31.4592485896

Orange = 34.5604700171

Width = 0.267949192431

Easy Way by Means of Regression

Missing Angle EFG = 30

Blue / Orange = 9 / 16

Another Approach in which EF is Vertical

Top 10.760

X = 1.55563491861

Missing Angle = 45

X / Y = tan 15

DAE = 12.0531053263

ABD = X = 18

Yellow = 25.9807621135

Blue Area = 27.7777777778 = 250 / 9

Missing Angle DFE = 30

Angle JBN = 52.1220128557

Orange Triangle Area = 42

Top 10.759

X = DE = 10.3923048454

Orange = 53.5898384862

40 ≤ Blue Rectangle Area ≤ 50

Min ( X + Y ) = 3.60555127546

tan BAC in Terms of a and b

R / R Minor = 14 / 3

X = 6.92820323028

Missing Angle BEF = 45

Rectangle Area = 14.94427191

Simplified / Improved

Missing Angle ABC = 75

Top 10.758

X = DL = 2.2360679775

Radius R = AC = 8

X / Y = 0.928476690885

Height h = AB = 9

Circle Area = 12.5663706144

Min ( AC + CD + BD ) = 13

Angle AFB = 55

Segment AE = 8

Red Area = 25.1327412287

Blue Quadrilateral Area = 30