Show notes for teachers

Ask students to make the complementary/
 supplementary angle by moving the angles. 
Students will make the vertex coincide/ one 
end of the segment coincide,  
Discuss all the misconceptions that arise.
Make sure you rotate both angles to show 
right angle need not be formed parallel to x-axis

A = (6.581818181818181, 0.22545454545454469)
B = (12.709090909090909, 3.88)
f = Segment(A, B)
α = 0.7155849933176751 rad (slider from 0 to 160°, step 0.017453292519943295)
C = Rotate(B, α, A)
β = Angle(B, A, C)
g = Segment(A, C)
D = (3.763636363636364, 4.370909090909091)
E = (6.4727272727272736, 6.025454545454545)
h = Segment(D, E)
a = false
F = Rotate(E, 180° - β, D)
γ = Angle(E, D, F)
i = Segment(D, F)

Tool: SquareTool
Tool2[ <Number>, <Point> ]
Input: side, A
Output: poly1

B = Point(Circle[A, side])
a = Segment(A, B)
c = Circle(A, side)
b = OrthogonalLine(A, a)
C = Intersect(c, b, 2)
d = Circle(C, side)
e = OrthogonalLine(C, b)
D = Intersect(d, e, 1)
poly1, a_1, b_1, d_1, c_1 = Polygon(A, B, D, C)