perplexus.info :: Geometry : Measure that angle III

Home > Shapes > Geometry

Measure that angle III (Posted on 2004-09-07)

Triangle ABC has side AB=AC, and angle BAC = 20 degrees.

D is a point on side AC with AD=BC. Find angle DBC.

Solve this without trigonometry.

See The Solution Submitted by Brian Smith

Rating: 3.2000 (5 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

re: Solution by cheating

| Comment 10 of 25 |

(In reply to Solution by cheating by nikki)

Congratulations -- definitely no trig. Using the solution of an earlier problem is not really cheating -- "On the shoulders of giants" ... I really wonder: Was Brain Smith "inspired" by Measure That Angle in formulating this rather sadistic problem?

Posted by Richard on 2004-09-08 13:32:10

Please log in:

Login:
Password:
Remember me:

Sign up! \| Forgot password

Search:

Search body:

Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (3)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:


perplexus dot info