Lesson: Intermediate Problem Solving - 04t05

Estimating — Geometry

[Page 4 of 27]
On geometry questions we can estimate or 'eyeball' relative measurements and then eliminate answer choices that are too large or too small to be correct.

However, estimate only on diagrams that are drawn to scale. If a diagram states "Not Drawn To Scale", do not try to estimate.

Let's try estimating on an example question.

In square JKLM above, N is the midpoint of side LM. If JN = , what is the length of a side of the square?

 

This question asks us to find the length of the side of the square. How might knowing the length of JN help us find the length of a side? Make sure to use the diagram when considering your answer to this question. Click Continue when you're ready.

Let's approximate what the correct answer should be. Enter your answer in the Text Box provided and then click Continue.

The correct answer choice will therefore be close to, but smaller than , which we can approximate as slightly more than .

Now, for each answer choice below, decide if it should be eliminated or if it should be kept as a possible correct answer, based on how it compares to our approximation. Click Continue when you're done.
 
Eliminate
Keep
  
Choice (A):
About the right size. Keep.
Choice (B):
Just under 14. Too small.
Choice (C):
About 9. Too small.
Choice (D):
Too small.
Choice (E):
Between 4 and 6. Too small.

By eyeballing the diagram and approximating the answer choices, we were able to determine the correct answer. If we hadn't used this approach, we would have had to take a more traditional problem-solving tack.
Back ; Next div>

Next to display next topic in the chapter.

Video Lessons and 10 Fully Explained Grand Tests

Large number of solved practice MCQ with explanations. Video Lessons and 10 Fully explained Grand/Full Tests.

Quantitative Aptitude Reasoning English General Knowledge Picture Patterns
More for You
MCQ with question Explanations Scholarships and Financial Aid

Graphs - Data Interpretation

Lessons and practice questions for Data Interpsection - Graphs

Arithmetic

Lessons on Basic to Advance Arithmetic with practice questions

PPSC - Research Officer Exam

Learn about the exam of PPSC - Research Officer

All in this Category

You may be interested in

Colleges in Bahawalpur

Find colleges in your area in Bahaw ...

Colleges in Lahore

Find a comprehensive list of major ...

Study in India

Have an opportunity to study in an ...

Study in Pakistani University or College

Detailed informationabout Study in ...

Admission and Employment Tests

Announcements of Admission and Empl ...

GRE Chemistry

Complete review of GRE Chemistry wi ...

Computer Sciences and IT

Career in Computer sciences and IT. ...

NWFPUET Engineering

NWFP University of Engineering and ...

About us

EntryTest.com is a test preparation service for students seeking successful career.

About Disclaimer

Quick Test Prep

NUST NET IBA Karachi SAT LUMS LCAT LSE

 

NTS GAT NTS NAT GMAT GRE ACT

Study Abroad

Education Abroad Business Schools MS in USA