Question of the Day

Can you answer today's question?

Register Next Tests:
1/24 , 3/14

http://sat.collegeboard.org/practice/sat-question-of-the-day
Oct
1
Question of the Day Statistics
Number Answered
Correct 74,897
Incorrect 75,445
150,342 responses
49% correct
See Last Thirty Questions:

Mathematics > Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer. 

10-1-2013-M37915.png

In the figure above, inscribed triangle A B C is equilateral. If the radius of the circle is r, then the length of arc A X B is

Answer Choices

Right-o!

Explanation

An equilateral triangle has three equal sides, so the lengths of the three arcs must be equal, and thus each arc is 1 over 3 of the circumference of the circle. The circumference of the circle is 2 times pi times r, so the length of arc A X B is 1 over 3 of 2 times pi times r, or (2 times pi times r) over 3.

Log in, track your progress and review questions.
Want to brush up on your skills? Just visit our Practice Questions area.

Buy Together, Get $10 Off

Buy Together & Get $10 Off
Study Guide
Online Course

The online course includes explanations and auto essay scoring for the Study Guide's 10 practice tests.

The Official Study Guide for All SAT Subject Tests™: 
Second Edition

Subject Test Study Guide

Get ready for test day with a brand new edition of our best-selling SAT Subject Test Study Guide! Brought to you by the test-maker, this is the ONLY study guide with actual, previously administered tests for all 20 SAT Subjects Tests™ to provide you with the real test-taking experience.

See Inside