# Math forum

error
 #1 Posted : Tuesday, December 20, 2011 11:12:11 AM
Rank: Newbie

Groups: Registered Users

Joined: 12/20/2011
Posts: 2

Section 2 question 17:
A rectangle measuring 8 cm by 14 cm is completely divided into x nonoverlapping triangles. Each triangle with the sides 2,7,8 cm. What is the values of x?
This can not be the correct answer. The answer assumes that the triangles have a right angle and the area 7. But there is no right angle in such a triangle and the area is actually approx 6,437 (Herons formula).

Is this an official SAT test example or just one from Math Planet?

lisa
 #2 Posted : Wednesday, January 11, 2012 4:21:16 PM

Joined: 3/16/2011
Posts: 33

error wrote:

Section 2 question 17:
A rectangle measuring 8 cm by 14 cm is completely divided into x nonoverlapping triangles. Each triangle with the sides 2,7,8 cm. What is the values of x?
This can not be the correct answer. The answer assumes that the triangles have a right angle and the area 7. But there is no right angle in such a triangle and the area is actually approx 6,437 (Herons formula).

Is this an official SAT test example or just one from Math Planet?

Hi!

Thank you for noticing it! You're absolutely right! It is wrrong. We will fix it immediately! Please tell us if you find any more mistakes.

It's an example test that Mathplanet has written but that is similar to the official SAT test examples

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