1. **State the problem:** We are given a circle with center O and points A, B, C, D, E on the circle. We need to find the measures of angles and arcs: m\angle A, mCE, m\angle C, m\angle D, and m\angle ABE.
2. **Given information:**
- Arc BD = 74°
- Angle at B = 24°
- Arc AD = 84°
3. **Find m\angle A:**
- Angle A is an inscribed angle that intercepts arc BD.
- The measure of an inscribed angle is half the measure of its intercepted arc.
4. **Calculate m\angle A:**
$$m\angle A = \frac{1}{2} \times m\overset{\frown}{BD} = \frac{1}{2} \times 74 = 37$$
**Final answer:**
$$m\angle A = 37$$
Angle A 75C507
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