As shown in Figure E, it is a point on the long line of the side bc of the square abcd, ce=ac, (1) to find the angle ace, the degree of the angle cae, (
The diagonal of the square bisects the diagonal, so the angle acd = 45 ce is the extension line of bc, so the angle dce = 90.
Angle ace = 45°+90°.
= 135
Connect ae in triangle ACE, ac=ce Angle ACE = 135.
Angle CAE = (180- 135)/2.
=22.5