Name: Angles and parallel lines: solution walkthrough
Uploaded: 2026-11-13
Duration: 1 min 43 s
Description: Lines m and n are parallel, and line t crosses both of them. Two alternate interior angles formed by these lines… Try it, then watch the animated solution.

Problem 10 of 34geo-010

Lines $m$ and $n$ are parallel, and line $t$ crosses both of them. Two alternate interior angles formed by these lines measure $(3x + 40)^\circ$ and $(5x - 20)^\circ$ . What is the value of $x$ ?

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Solution walkthrough1:43