Have questions about your preparation or an upcoming test? Need help modifying the Study Plan to meet your unique needs? No problem. Just book a Skype meeting with Brent to discuss these and any other questions you may have.

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

- Study Guide
- Blog
- Philosophy
- Office Hours
- Extras
- Prices

## Comment on

Value of w## Dear Brent, this question

I understand the quadrilateral was not focused but other questions provide several approach to solve same question. An attempt to look at it as a quadrilateral is impossible

Please comment

## Hi Ademini,

Hi Ademini,

You are correct to say that ABDE is a quadrilateral. However, the sum of the angles in a quadrilateral is 360 degrees (not 180).

Cheers,

Brent

## AS we know that this is a

OR THE PROPERTY MIGHT BE DIFFERENT FROM ABOVE?

## That property you mentioned

That property you mentioned (opposite angles are equal) does not apply to all quadrilaterals.

It is true for squares, rectangles, rhombuses and parallelograms, but it is not true for other quadrilaterals.

Cheers,

Brent

## Dear sir,

Can we solve it by adding all the angel of polygon and equating it by 360° please let me know if I can do so.

## If quadrilateral ABDE is the

If quadrilateral ABDE is the polygon you're referring to, that approach just might work.

Try it, and see how you do.

Cheers,

Brent

## what level would this

## I place it in the 650-800

I place it in the 650-800 range.