## Math Problem Statement

## Solution

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## Math Problem Analysis

### Mathematical Concepts

Circle Theorems

Cyclic Quadrilaterals

### Formulas

Opposite angles in a cyclic quadrilateral sum to 180°

Angle at the center is twice the angle at the circumference

### Theorems

Cyclic Quadrilateral Theorem

Angle at the Center Theorem

### Suitable Grade Level

Grades 9-11