Question

if ∠6 = ∠10 and ∠5 = ∠7, which describes all the lines that must be parallel? o only lines r and s must be parallel. o only lines t and u must be parallel. o lines r and s and lines t and u must be parallel. o neither lines r and s nor lines t and u must be parallel.

Explanation:

Step1: Analyze ∠6 and ∠10

∠6 and ∠10 are corresponding angles. If ∠6 = ∠10, then lines t and u are parallel.

Step2: Analyze ∠5 and ∠7

∠5 and ∠7 are vertical - angles, their equality doesn't prove r and s parallel.

Answer:

Only lines t and u must be parallel.