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Obtuse triangle from equilateral triangle (Posted on 2023-08-14) Difficulty: 3 of 5
Let ABC be an equilateral triangle with point D on AC.

Create a new triangle with side lengths AD, DC, BD.

Prove one angle of this new triangle is 120 degrees.

No Solution Yet Submitted by Jer    
Rating: 4.5000 (2 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Solutionre: Solution - QuickerBrian Smith2023-08-15 00:57:51
re: Another solutionSteve Herman2023-08-15 00:56:10
SolutionAnother solutionBrian Smith2023-08-14 23:52:38
SolutionSolutionBrian Smith2023-08-14 11:39:08
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