In this module, you'll learn all of the concepts, techniques and strategies needed to answer geometry questions on the GMAT. In particular, this module covers:

 Lines and angles Isosceles and equilateral triangles Right triangles Special triangles Similar triangles Quadrilaterals Circles: area & circumference Circles: sectors & arcs Circles: inscribed angles Circles: tangent lines Cylinders Surface area & volume

### Two ways to prepare

Beneath each video lesson in this module, we have a Related Resource box with practice questions that test the concepts covered in the video. With this lesson format, you have two learning options:

• Watch the video lesson first and then reinforce your learning by answering several related questions, or…
• Tackle the practice questions first and watch the lesson only if you need help with the concepts the practice questions test

## GMAT GEOMETRY VIDEOS

• 1. Lesson: Lines and Angles (7:18)
• 2. Question: 3x-5 (2:10)
• 3. Lesson: Triangles - Part I (5:55)
• 4. Question: Is w>x? (2:40)
• 5. Question: x in terms of y (3:26)
• 6. Lesson: Assumptions and Estimation on the GMAT (4:42)
• 7. Lesson: GMAT Geometry Strategies - Part I (1:07)
• 8. Lesson: Triangles - Part II (8:15)
• 9. Question: Bit of Everything (1:46)
• 10. Lesson: Right Triangles (9:18)
• 11. Question: Rectangle’s height (2:10)
• 12. Question: 3-D Diagonal (3:02)
• 13. Lesson: Special Right Triangles (6:42)
• 14. Question: 3 Triangles (3:53)
• 15. Lesson: Similar Triangles (4:28)
• 16. Question: Triangles with Intersection (2:16)
• 18. Lesson: Polygons (3:17)
• 19. Lesson: Circles (4:47)
• 20. Question: Circle Area with Triangle (2:39)
• 21. Lesson: Pieces of Pi (3:37)
• 22. Question: Intersection and Arc (1:54)
• 23. Lesson: Circle Properties (3:36)
• 24. Question: Circle with Parallel Lines (3:00)
• 25. Lesson: Volume and Surface Area (6:44)
• 26. Lesson: Units of Measurement (1:56)
• 27. Lesson: Tackling Data Sufficiency Questions (7:51)
• 28. Lesson: GMAT Geometry Strategies - Part II (1:54)
• 29. Question: Parallel or Not (1:30)
• 30. Question: Value of x (1:33)
• 31. Question: Tangent Line (2:08)
• 32. Question: Possible Right Angle (2:04)
• 33. Question: Tilted Triangle Area (2:13)
• 34. Question: Parallelogram Perimeter (2:16)
• 35. Question: Triangle with Variable Angles (1:44)
• 36. Question: Cylinder Surface Areas (1:37)
• 37. Question: Is x less than 80 degrees? (2:06)
• 38. Question: Comparing Areas (2:24)
• 39. Question: Triangle Area (4:09)
• 40. Question: Value of w (3:06)
• 41. Question: Diagonal of Rectangle (2:56)
• 42. Question: Intersecting Circles (3:44)
Total viewing time for the GMAT Geometry module: 150 minutes.

NOTE: In each of the above video lessons, you’ll find a Related Resources box containing several practice questions that are specifically related to the concepts covered in that lesson (e.g., the lesson on quadrilaterals). Conversely, the practice questions below cover a variety of topics under the umbrella of GMAT Geometry, and are intended for general reinforcement.

Given this, you may find it beneficial to work on the questions below after you’ve mastered the module content by watching the video lessons and answering concept-specific practice questions from the Related Resources boxes. For more on this learning strategy, visit our course overview page.

Problem Solving (level of difficulty: 350 to 500)

Circle intersections  (circles, triangles)

Wagon wheel  (circles)

Comparing volumes  (volume, ratios)

Lengths of a triangle  (triangles)

Difference in volumes  (volume)

Problem Solving (level of difficulty: 500 to 650)

Spheres in a box  (volume)

Triangle in circle  (circles, triangles)

Concentric circles  (circles)

Lengths of a triangle  (triangles)

Melting ice cubes  (volume, ratios)

Dodecagon  (polygons)

Three intersecting lines  (triangles, coordinate plane)

Inscribed equilateral triangle  (circles, triangles)

Area of PQR  (triangles, coordinate plane)

Cream cheese  (volume, percent)

Filling a cylindrical tank  (volume)

Problem Solving (level of difficulty: 650 to 800)

Radii of circle  (circles, coordinate plane)

Twisted wire  (circles, algebra, VIACs)

Hypotenuse length  (triangles)

Find value of x  (triangles)

Cylinder in box  (volume)

Data Sufficiency (level of difficulty: 350 to 500)

Length and width of rectangle  (quadrilaterals)

Area of triangle XYZ  (triangles)

Find angle R  (triangles)

Data Sufficiency (level of difficulty: 500 to 650)

4 odd lines  (lines and angles)

Is ABC isosceles? (triangles)

Data Sufficiency (level of difficulty: 650 to 800)

Minor arc CD  (circles)

Circle and line in triangle  (circles, triangles)

Circle in the coordinate plane  (circles, coordinate plane)

Perimeter greater than 30  (triangles)

Line segment BD  (triangles)

## Practice from the Official Guides

Official Guide for GMAT Review (2017 edition)

Problem Solving: 16, 17, 24, 29, 37, 39, 51, 80, 82, 90, 97, 106, 126, 127, 138, 142, 157, 160, 197, 212, 216, 219

Data Sufficiency: 231, 237, 259, 260, 262, 286, 289, 296, 320, 329, 334, 342, 358, 360, 362, 370, 373, 376, 380, 383, 385, 396, 400

Official Guide for GMAT Review (2016 edition)

Problem Solving: 12, 13, 18, 23, 31, 33, 41, 45, 70, 73, 81, 86, 94, 113, 122, 125, 139, 142, 149, 185, 214, 215, 217

Data Sufficiency: 26, 44, 49, 51, 56, 86, 90, 98, 115, 116, 118, 126, 129, 131, 133, 137, 143, 145, 159, 161, 167

Official Guide for GMAT Review (2015/13th edition)

Problem Solving: 3, 13, 18, 36, 62, 75, 78, 92, 104, 121, 147, 159, 161, 165, 166, 175, 197, 210, 213

Data Sufficiency: 19, 30, 35, 42, 56, 73, 79, 100, 102, 113, 117, 119, 122, 128, 130, 145, 149, 152, 165, 166

While answering practice questions from the Official Guide for GMAT Review (2017, 2016 or 2015), you can enter your responses directly into our downloadable Improvement Chart. This will help track your progress and identify areas of weakness.