Top 10.917

X = AE = 4

Semicircle Area = 31.4159265359

a / b = 3

Shaded Area = 12

X = CBP = 70

Shaded Area = 5 / 2 = 2.5

Rectangle ABCD Area = 66

Top 10.916

R / R1 = 3.73205080757

Angle BDE = 50

X / Y = 4

Shaded Area = 4

Green Area = 0.724688589649

Green Area = 59.6902604182

X = DBF = 30

Perimeter ( Blue ) = 9.81379936423

Orange Area = 26.0913934395

Orange Area = 54.956771553

Top 10.915

Shaded Area = 15.3057836398

Angle BAC = 75

Shaded Area = 140

X = BF = 3

Square Area = 5.76

X = BCD = 18

Shaded Area = 10

G / P = 1.01458980338

X = CAP = 22.5 = 45 / 2

EF = 3.87298334621

Top 10.914

Mathematical Proof

X = AD = 6

BP = 6.7082039325

Radius R = 19

Shaded Area = 25

Blue Area / Total Area = 5 / 18

Shaded Area = 1.95623614008

FG = 3.577708764

X = BAC = 40

X = 100

Top 10.913

IP = 1.97204829827

Radius R = 5

Height DE = 10.5830052443

Parallelogram Areal = ?

Triangle ABC Area = 24

X = ADB = 30

BD = 3.46410161514

Shaded Area = 24

Easy Way

Triangle ABE Area = 24

Segment CD = 3

Top 10.912

Shaded Area = 24.8778986464

X = AD = 4

Orange Area = 39.3296611698

Missing Angle BAC = 30

Square ABCD Area = 2

Solution = 18

Square ABCD Area = 180

X = DE = 3.60555127546

Angle ACD = 15

Yellow Area = 5.59119022502