Question

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look at this diagram: if $overleftrightarrow{gi}$ and $overleftrightarrow{jl}$ are parallel lines and $mangle ghk = 70^{circ}$, what is $mangle ihf$?

Explanation:

Step1: Identify vertical - angle relationship

$\angle GHK$ and $\angle IHF$ are vertical angles.

Step2: Recall vertical - angle property

Vertical angles are congruent, so $m\angle IHF=m\angle GHK$.

Answer:

$70$