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 Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion

December 7th, 2016, 07:05 AM   #1
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Joined: Aug 2016
From: Santos-SP / BRASIL

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I need help!

In the following figure, ABC is a triangle with sides measuring 25 cm, AB = AC = 15 cm and BC = 20 cm.

And is quad BDEF a square.

In those circumstances, the measure in centimeters, square BDEF side is equal to?
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 December 7th, 2016, 07:31 AM #2 Senior Member     Joined: Sep 2015 From: Southern California, USA Posts: 1,495 Thanks: 753 this can't possibly be correct the way you've labeled things. AC is the hypotenuse of a right triangle and thus AC > BC, AC > AB
 December 7th, 2016, 08:09 AM #3 Global Moderator   Joined: Dec 2006 Posts: 18,052 Thanks: 1395 The intention is presumably that AC = 25 cm, AB = 15 cm and BC = 20 cm. If BD = DE = x, DC = (20 cm - x) and x/(20 cm - x) = 15/20, so x = (60/7) cm.

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