Geometry · Topic guide
Similarity, Right Triangles & Trigonometry — Geometry
Prove AA similarity. Solve elevation/depression problems. Calculate/use cosine.
Practice more with MathNivoAndroid app coming soonExplore the idea here, then continue practicing in the Android app when available.
What you’ll learn
- Prove AA similarity.
- Solve elevation/depression problems.
- Calculate/use cosine.
- Perform coordinate dilations.
Explore the skills
Choose an idea below to read a worked example and try one question.
- Prove AA similarityProve AA similarity.
- Solve elevation/depression problemsSolve elevation/depression problems.
- Calculate/use cosineCalculate/use cosine.
- Perform coordinate dilationsPerform coordinate dilations.
- Understand effects on lengths and anglesUnderstand effects on lengths and angles.
- Understand dilation scale factorsUnderstand dilation scale factors.
- Find missing angle using inverse trigFind missing angle using inverse trig.
- Find missing side using trigFind missing side using trig.
- Understand altitude/right-triangle similarityUnderstand altitude/right-triangle similarity.
- Model real situations using trigModel real situations using trig.
- Use SAS similarityUse SAS similarity.
- Choose similarity criterionChoose similarity criterion.
- Define similarity using transformationsDefine similarity using transformations.
- Solve missing-side problemsSolve missing-side problems.
- Calculate/use sineCalculate/use sine.
- Use SSS similarityUse SSS similarity.
- Calculate/use tangentCalculate/use tangent.
- Understand sine, cosine and tangentUnderstand sine, cosine and tangent.