Standards:
Prove theorems about lines and angles. Theorems include: vertical angles are congruent; when a transversal crosses parallel lines, alternate interior angles are congruent and corresponding angles are congruent; points on a perpendicular bisector of a line segment are exactly those equidistant from the segment's endpoints.
Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.*
Parallel lines
https://mathbitsnotebook.com/Geometry/ParallelPerp/PPangles.html (helpful notes)
https://www.khanacademy.org/math/basic-geo/basic-geo-angle/angles-between-lines/e/parallel_lines_1
https://www.mathsisfun.com/geometry/parallel-
https://www.mathwarehouse.com/geometry/angle/parallel-lines-cut-transversal.php
https://www.mathwarehouse.com/geometry/angle/parallel-lines-transversal-practice.php
Right Triangle Trigonometry
Solve for side:
https://www.youtube.com/watch?v=ghx5JAPjBXI
https://www.mathsisfun.com/algebra/trig-finding-side-right-triangle.html
https://www.mathwarehouse.com/trigonometry/sine-cosine-tangent-practice3.php
https://www.mathwarehouse.com/trigonometry/sohcahtoa-real-world-applications.php
Solve for angle:
https://www.mathsisfun.com/algebra/trig-finding-angle-right-triangle.html
https://www.varsitytutors.com/trigonometry-help/finding-angles
Solving for angles & sides:
https://courses.lumenlearning.com/boundless-algebra/chapter/trigonometry-and-right-triangles/ (notes)