SAT Geometry Practice: Lines, Angles, and Triangles

Lines, Angles, and Triangles questions test core geometry relationships. These SAT triangle questions focus on angle rules, parallel lines, triangle properties, isosceles facts, and similarity.

1. Mark relationships before writing equations: vertical angles, linear pairs, parallel lines, congruent sides, right angles, and similar triangles.
2. Apply the relevant angle rule, triangle sum, isosceles fact, or similarity ratio.
3. Set up an equation when the diagram gives expressions instead of numbers.