Answer:

Explanation:
Statement:
- The measure of central angle is twice that of the circumference angle.
Solution:
Given that,
Central angle = 3x + 90
Circumference angle = 10x + 28
According to the statement,
3x + 90 = 2(10x + 28)
3x + 90 = 20x + 56
- Subtract 56 from both sides
3x + 90 - 56 = 20x
3x + 34 = 20x
- Subtract 3x from both sides
34 = 20x - 3x
34 = 17x
34/17 = x
2 = x
x = 2
![\rule[225]{225}{2}](https://img.qammunity.org/2024/formulas/mathematics/high-school/yk3l6bxs46equldxx0z8qla0zuvm8l328e.png)