segment a B. Use angle bisector to construct the ff. angles 1. A 30° angle can be obtained by bisecting a 60° angle. 2. A 15° angle can be obtained by bisecting a 30° angle. 3. A 45° angle can be obtained by bisecting a 90° angle. 4. A 22.5° angle can be obtained by bisecting a 45° angle. C. Construct the ff. parallel lines
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