perplexus.info :: Probability : Triangular Cubes

Triangular Cubes (Posted on 2004-12-04)

Three points have been chosen randomly from the vertices of a cube. What is the probability that they form (a) an acute triangle; (b) a right triangle?

See The Solution Submitted by Erik O.

Rating: 3.0000 (2 votes)

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i c it this way

| Comment 4 of 11 |

B) 3/7 : ON EACH SIDE THERE ARE 4 POSSIBLE RIGHT ANGLED TRIANGLES, TOTAL=24
DIViDE BY 56 POSSIBLE 24/56= 3/7
A) THE REST IS ACUTE i.e. 4/7

am i wrong???
ady

Posted by Ady TZIDON on 2004-12-05 07:53:06

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