Points C, D and K lie on a circle centered at O. Find the COD angle if the CKD angle is 64 degrees.

univerkov | June 22, 2021 | education

According to the “Internal One-Sided Corners” property, the angles C and D are equal.
COD stands for isosceles triangle. Angle C and D 40 °.
The sum of the angles of the Triangle is 180 °.
According to the axiom on the sum of angles ：
180 – (40 + 40) = 100 °.
Answer: The COD angle is 100 °.

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