📘 plane geometry

1. **Problem Statement:** Given two parallel lines $l \parallel m$, with $\angle 1 = 125^\circ$ and $\angle 7 = 50^\circ$, find the measure of $\angle 5$. 2. **Key Concepts:** When

1. **State the problem:** We have two right triangles \(\triangle PDW\) and \(\triangle WTC\). Given \(\angle WPD = 30^\circ\), \(WC = 6\), \(WT = 3\), and \(WD = 12\), we need to

1. **Problem:** Parallelogram ABCD is similar to parallelogram EFGH. Given side BC = 21 in, AB = 6 in, and side FG = 7 in, find the length of GH. 2. **Formula and rules:** For simi