Lines, Angles, and Triangles: SAT Practice Questions
98 official Lines, Angles, and Triangles questions (Geometry and Trigonometry) from the SAT Suite Question Bank, in the same question-ID order used in signed-in practice. Every question shows the answer and a full explanation, with step-by-step Desmos solutions available for most questions. It is free, and no account is needed.
What does Lines, Angles, and Triangles test on the SAT?
These questions use angle relationships, triangle properties, similarity, congruence, and coordinate geometry. A few marked equalities often unlock several additional relationships.
Common question types
- Find an unknown angle or side
- Use similar or congruent triangles
- Apply parallel-line and transversal relationships
Common traps
- Assuming a diagram is drawn to scale
- Matching the wrong corresponding sides in similar triangles
- Using supplementary angles as if they were equal
Difficulty distribution
Start with the easier questions, then work toward the highest score bands.
- Easy
- 37
- Medium
- 29
- Hard
- 32
- Extreme
- 0
Featured Lines, Angles, and Triangles questions
How do I improve at Lines, Angles, and Triangles?
- 1Transfer all stated equalities and parallel markings onto the diagram.
- 2Write the angle or side relationship before substituting numbers.
- 3For similarity, preserve vertex order when building proportions.
Desmos method
Use equations to solve linked angle or side constraints, and graph coordinate lines when slope or intersection is involved. The calculator supports the algebra but should not replace diagram relationships.
Related Geometry and Trigonometry skills
All 98 official questions
- Question 1 0013adbdMedium
- Question 2 010243e6Hard
- Question 3 014edcb7Medium
- Question 4 055aafe7Medium
- Question 5 087cdcfdEasy
- Question 6 0bb39de4Easy
- Question 7 0d3f51dcEasy
- Question 8 1318dfeaHard
- Question 9 17912810Hard
- Question 10 1c3d613cMedium
- Question 11 1dacfb94Hard
- Question 12 1dc7e423Hard
- Question 13 2085e10eMedium
- Question 14 2adbf1b1Medium
- Question 15 2d2cb85eHard
- Question 16 2f7c92adMedium
- Question 17 322a6dfeHard
- Question 18 345cc36aHard
- Question 19 3563d76dEasy
- Question 20 36200a38Easy
- Question 21 3828f53dEasy
- Question 22 3b225698Hard
- Question 23 3b44439bEasy
- Question 24 3b4b5b1eEasy
- Question 25 410bdbe6Easy
- Question 26 42b4493bEasy
- Question 27 43236565Easy
- Question 28 48fb6483Hard
- Question 29 4a141e77Easy
- Question 30 4ff7b652Medium
- Question 31 51f26ce8Medium
- Question 32 5207e508Easy
- Question 33 5733ce30Easy
- Question 34 585a9138Medium
- Question 35 5b4757dfHard
- Question 36 5b918ebbEasy
- Question 37 64d1f49fEasy
- Question 38 686b5212Medium
- Question 39 694b7fceHard
- Question 40 697b3954Medium
- Question 41 69f4bbdcEasy
- Question 42 6a3fbec3Hard
- Question 43 6d99b141Hard
- Question 44 6dd463caMedium
- Question 45 7268586cEasy
- Question 46 739f1bbcEasy
- Question 47 740bf79fHard
- Question 48 7a11ceeaHard
- Question 49 7a8ad237Medium
- Question 50 7ce2e728Hard
- Question 51 81b664bcMedium
- Question 52 8364487aMedium
- Question 53 858809e7Hard
- Question 54 901c3215Hard
- Question 55 901e3285Medium
- Question 56 933fee1aMedium
- Question 57 9342ca50Easy
- Question 58 94364a79Medium
- Question 59 947a3cdeHard
- Question 60 95ca2683Medium
- Question 61 9912e19fEasy
- Question 62 992f4e93Easy
- Question 63 9d078710Easy
- Question 64 a0369739Hard
- Question 65 a456f28cEasy
- Question 66 a4c05a1bMedium
- Question 67 a6dbad6bEasy
- Question 68 adae6543Hard
- Question 69 afa3c48bEasy
- Question 70 b1e1c2f5Hard
- Question 71 b434e103Easy
- Question 72 b5d62bbaHard
- Question 73 bd7f6e30Hard
- Question 74 c24e1bdaEasy
- Question 75 c41eb616Hard
- Question 76 c7bed21dMedium
- Question 77 c8d60e48Easy
- Question 78 cbe8ca31Easy
- Question 79 cf0d3050Easy
- Question 80 d21270daEasy
- Question 81 d3fe472fMedium
- Question 82 d5f349b7Easy
- Question 83 d7a8aa9cMedium
- Question 84 dfc420b2Easy
- Question 85 e0d2e21aEasy
- Question 86 e10d8313Hard
- Question 87 e89f63bfMedium
- Question 88 ecc98c87Medium
- Question 89 eeb4143cHard
- Question 90 f1747a6aEasy
- Question 91 f67255eaHard
- Question 92 f731d88bHard
- Question 93 f7dbde16Hard
- Question 94 f88f27e5Medium
- Question 95 f9d40000Easy
- Question 96 fd8745fcMedium
- Question 97 fecc446dHard
- Question 98 ffc39dc5Medium
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