1) Explain why you think a tangent of a circle is always perpendicular to the radius at the point of tangency. 2) Explain why you think angles formed by drawing lines from the ends of the diameter of a circle to it's circumference form a right angle.

step-by-step explanation:

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°

sounds & other waves originate from any vibrating object