HSG.SRT.B.5
Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures.
Example Problems
Polygon H is a scaled copy of Polygon F using a scale factor of .
Polygon H's area is what fraction of Polygon F's area?
Polygon H's area is what fraction of Polygon F's area?
Polygon E is a scaled copy of Polygon F using a scale factor of .
Polygon E's area is what fraction of Polygon F's area?
Polygon E's area is what fraction of Polygon F's area?
Polygon R is a scaled copy of Polygon S using a scale factor of .
Polygon R's area is what fraction of Polygon S's area?
Polygon R's area is what fraction of Polygon S's area?
Khan Academy ResourcesTriangle similarity reviewTriangle congruence reviewDetermine congruent trianglesFind angles in congruent trianglesSolve triangles: angle bisector theoremDetermine similar triangles: AnglesSpecial right trianglesDetermine similar triangles: SSSSolve similar triangles (basic)Solve similar triangles (advanced)Use similar trianglesProve triangle similarityJustify constructionsUse ratios in right trianglesFind angles in isosceles trianglesProve triangle propertiesProve parallelogram propertiesProve triangle congruenceDetermining congruent trianglesGeometry proof problem: congruent segmentsGeometry proof problem: midpointIsosceles & equilateral triangles problemsFinding angles in isosceles triangles (example 2)Finding angles in isosceles trianglesCorresponding angles in congruent trianglesSolving similar trianglesDetermining similar trianglesSolving similar triangles: same side plays different rolesChallenging similarity problemUsing similar & congruent triangles30-60-90 triangle example problemUsing the angle bisector theoremGeometry proof problem: squared circleCalculating angle measures to verify congruenceGeometry word problem: Earth & Moon radiiGeometry word problem: a perfect pool shotProving triangle congruenceGeometry word problem: the golden ratio

1-on-1 AI tutoring aligned to HSG.SRT.B.5. Instant help for students, real-time insights for teachers.
Used in classrooms by 100,000+ students at Baltimore County, Plano ISD, Deer Valley USD, KIPP, and districts nationwide.
Free for teachers, forever →