Posted by **Lauren** on Monday, September 1, 2008 at 2:09pm.

Triangles C and D are similar. The area of triangle C is 47.6 in(2). The base of Trianfle D is 6.72 in. Each Dimension of D is 6/5 the corresponding dimension of C. What is the Height of D?

- Algebra -
**David Q**, Monday, September 1, 2008 at 3:59pm
The area of D will be (6/5)² times the area of C, which is (6/5)² x 47.6"² = 68.544"² (don't forget that you need to square that factor of (6/5), because it applies to both the base AND the height). The base of D is 6.72", and the area of a triangle is half the base times the height. You've now got both the area and the base... and the height is half the area divided by the base.

- Algebra -
**Lauren**, Monday, September 1, 2008 at 10:46pm
thank you soooo much!

- Algebra -
**David Q**, Monday, September 1, 2008 at 4:19pm
Er... if the area is half the base times the height, then the height must be TWICE the area divided by the base. Sorry!

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