Comments on: [Video] E-Math Popular Exam Question: Finding Ratio of Areas in Vectors (Includes 3 Strategies & Revision of Similar Triangles) http://www.singaporeolevelmaths.com/2009/03/27/video-e-math-popular-exam-question-finding-ratio-of-areas-in-vectors-includes-3-strategies-revision-of-similar-triangles/ Simple Tips for Better Maths Results! Wed, 19 Oct 2011 12:26:29 +0000 hourly 1 http://wordpress.org/?v=3.0.4 By: alwaysLovely http://www.singaporeolevelmaths.com/2009/03/27/video-e-math-popular-exam-question-finding-ratio-of-areas-in-vectors-includes-3-strategies-revision-of-similar-triangles/comment-page-1/#comment-2169 alwaysLovely Mon, 20 Sep 2010 15:35:05 +0000 http://www.singaporeolevelmaths.com/?p=1248#comment-2169 Are you referring to triangle BCD and ABD? If so, if we were to consider the base of BCD to be BC, the perpendicular height is the distance between the pair of // lines BC and AD. Similarly, if the base of triangle ABD is AD, the perpendicular height is also the distance between the pair of // lines BC and AD. There isn't any assumption that angle DAB is a right angle. Are you referring to triangle BCD and ABD?
If so, if we were to consider the base of BCD to be BC, the perpendicular height is the distance between the pair of // lines BC and AD.
Similarly, if the base of triangle ABD is AD, the perpendicular height is also the distance between the pair of // lines BC and AD.

There isn’t any assumption that angle DAB is a right angle.

]]> By: alwaysLovely http://www.singaporeolevelmaths.com/2009/03/27/video-e-math-popular-exam-question-finding-ratio-of-areas-in-vectors-includes-3-strategies-revision-of-similar-triangles/comment-page-1/#comment-2168 alwaysLovely Mon, 20 Sep 2010 15:26:52 +0000 http://www.singaporeolevelmaths.com/?p=1248#comment-2168 We need to see the diagram before deciding if the triangles are similar. // lines don't necessarily equate to similar triangles. We need to see the diagram before deciding if the triangles are similar.
// lines don’t necessarily equate to similar triangles.

]]> By: Aden http://www.singaporeolevelmaths.com/2009/03/27/video-e-math-popular-exam-question-finding-ratio-of-areas-in-vectors-includes-3-strategies-revision-of-similar-triangles/comment-page-1/#comment-2165 Aden Sun, 19 Sep 2010 14:24:43 +0000 http://www.singaporeolevelmaths.com/?p=1248#comment-2165 Greetings! I WANT TO CLARIFY. How do we know/assume that angle DAB is a right-angle which leaves us to conclude that the height of BC is = to the height of BA? THANKS! Greetings! I WANT TO CLARIFY. How do we know/assume that angle DAB is a right-angle which leaves us to conclude that the height of BC is = to the height of BA? THANKS!

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