perplexus.info :: Geometry : Don't assume you know this concave pentagon

Don't assume you know this concave pentagon (Posted on 2019-09-01)

ABCDE is a concave pentagon with angle BCD being concave. Angles BAE, BCD, and CDE are right angles. Given AB=4, BC=3, CD=4, and DE=5, find the length of AE.

No Solution Yet Submitted by Brian Smith

Rating: 5.0000 (3 votes)

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re: Two solutions

| Comment 7 of 18 |

(In reply to Two solutions by Jer)

Yes, extending ED to point F, completing the rectangle BCDF, is very elegant.

Posted by Pablo on 2020-07-31 05:22:58

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