I need help on these review questions

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis. y = 7ex, y = 7e^-x, x = 1; about the y-axis

What is the measure of angle 1? a.28 b.152 c.168 d.64