Now that you’ve mastered GMAT Geometry, it’s time to let the world know!

- Video Course
- Video Course Overview - READ FIRST
- General GMAT Strategies - 7 videos (all free)
- Data Sufficiency - 16 videos (all free)
- Arithmetic - 38 videos (some free)
- Powers and Roots - 36 videos (some free)
- Algebra and Equation Solving - 73 videos (some free)
- Word Problems - 48 videos (some free)
- Geometry - 42 videos (some free)
- Integer Properties - 38 videos (some free)
- Statistics - 20 videos (some free)
- Counting - 27 videos (some free)
- Probability - 23 videos (some free)
- Analytical Writing Assessment - 5 videos (all free)
- Reading Comprehension - 10 videos (all free)
- Critical Reasoning - 38 videos (some free)
- Sentence Correction - 70 videos (some free)
- Integrated Reasoning - 17 videos (some free)

- Study Guide
- Office Hours
- Extras
- Guarantees
- Prices

## Comment on

Circle Properties## Brent, can you please help me

## Question #8 requires a rule

Question #8 requires a rule regarding cyclic quadrilaterals. These are quadrilaterals that are inscribed in a circle.

For all cyclic quadrilaterals, any two angles that are opposite each other will add to 180 degrees.

So, for question #8, x + 135 = 180 degrees, so x = 45

For the GMAT, you don't need to know anything about cyclic quadrilaterals. So, you can disregard that question.

Sorry, I didn't notice question #8 when I posted the link. I have edited the link accordingly.

## Add a comment