The answer is C (EF and HI)
This is because both lines pass through the centre A, meaning both are diameters. Hence, they are equal in length.
Which one do you want us to solve for you
Answer:
30
Step-by-step explanation:
3:7
30 students
3\10×30=9
7\10×30=21
9+21=30
The measure of angle ACB for circle centered at point O is 21°
<h3>What is an
equation?</h3>
An equation is an expression that shows the relationship between two or more numbers and variables.
∠AOB = 2 * ∠ACB (angle at center is twice the angle at circumference)
42 = 2 * ∠ACB
∠ACB = 21°
The measure of angle ACB for circle centered at point O is 21°
Find out more on equation at: brainly.com/question/2972832
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Answer:
31 degrees
Step-by-step explanation:
1. triangle= 180 degrees.
2. 84+ x + (180-115)= 180
3. 84+65+ x= 180
4. 180- 149= 31
5. x= 31