Point O is the center of the circle, ∠AOB = 70 °. Find the value of the angle ACB

By the condition ∠AOB = 70 °, this angle is central, respectively, the arc AB (lower part) is also equal to 70 °. ∠ACB – is an inscribed angle and is equal to half of the arc on which it relies (by the inscribed angle theorem). Accordingly, 70/2 = 35.
Answer: ∠ACB = 35 °.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.