I need help with this problem, I don’t know what theorems to use.

Given:
TC, PD, TP tangent to circle k(O) at C, D, and E respectively.
TC ∥ PD
Prove:
TO ⊥ PO

Here is a hint:

Use the Linear Pair Perpendicular Theorem.

This states that when two straight lines intersect at a point and form a linear pair of equal angles, they are perpendicular!  Good Luck!

step-by-step explanation:

ok so im not 100% sure but you would start by adding 5.1t and 1.9t beacuse they have the same variable. that is 7t.   then add -3.6 + 1.2 which is -2.4

so then keep that as -2.4 + 7t. i apologize if this is incorrect. best luck on your test < 3