Answer:
Explanation:
CAE
You have to see that CAE is made up of 2 60 degree angles. The central figure is a hexagon cut in 1/2. The six sides of a hexagon has 6 interior angles that are each 60 degrees. They came about because The triangles are equilateral triangles. Since there are 2 of central angles that make up CAE then <CAE = 120 degrees.
CAD
CAD is one of the central angles. It must be 60 degrees.
BAE is a straight line. This particular straight line is a diameter. It is 180 degrees.
DEC
This is the hardest of all the angles. Any angle that shares the same base as one of the central angles and touches the circumference of the circle, is 1/2 the measure of the central angle since CAD = 60 degrees, DEC must be 30 degrees.