Proofs – ekKer

30,45, and 60

60 Degrees

Amortization

Basic

Bisect a Angle

Bisect a Line

Centroid

Cos(-A)=CosA

Cos(A-B)

Cos(A+B)

Cos2A

Cosine Rule

De Moivre’s Theorem

Divide a Line into 3

Incircle

Orthocentre

Perpendicular Line through Point not on line

Sin Rule

Sin sq +Cos sq =1

Sin(A-B)

Sin(A+B)

Square Root of 2

Sum of r squared

Tan(A+B)

Tangent to a Circle

Theorem 1

Theorem 2

Theorem 3

Triangle given 2 sides and an Angle

Triangle Given 3 Sides

Triangle with 1 length and 2 angles