# Similarity statement. I keep getting stuck

• Feb 9th 2011, 05:24 PM
vaironxxrd
Similarity statement. I keep getting stuck
Guys Hello i just keep getting stuck with this problems for example in the First problem i believe is AAA. But i just dont know how to relate this well. If someone could draw and show why are this triangle related it would be big help . Thanks

http://img218.imageshack.us/img218/5752/similarity.jpg

• Feb 9th 2011, 05:30 PM
rtblue
For the first one, you must know that the base angles of an isosceles triangle are equal. That means (for the very first triangle) angle N = angle O. Continue from there.

For the second one, you cannot prove that the two triangles are similar, because you are given no information regarding the sides, and you do not have any information about the other angles in triangle KLM.

For the third one, we see that the two triangles are equilateral, because both of them have equal sides. An equilateral triangle will always be similar to another equilateral triangle, because the angles will always be 60 degrees.
• Feb 9th 2011, 05:41 PM
vaironxxrd
Quote:

Originally Posted by rtblue
For the first one, you must know that the base angles of an isosceles triangle are equal. That means (for the very first triangle) angle N = angle O. Continue from there.

For the second one, you cannot prove that the two triangles are similar, because you are given no information regarding the sides, and you do not have any information about the other angles in triangle KLM.

For the third one, we see that the two triangles are equilateral, because both of them have equal sides. An equilateral triangle will always be similar to another equilateral triangle, because the angles will always be 60 degrees.

YAY :D I had it Right!!!!, Btw i cleared this one but i had that P=7 and Q =71 So that would be ANGLE ANGLE ANGLE (AAA)

Second i said not enough info and 3 i wasnt sure. But Now that you say they are all Equal i believe AAA as well. You don't mind if i upload the 4th problem and Try to do it? is kind of messy but i can still post what i did for it
• Feb 9th 2011, 05:42 PM
rtblue
I don't mind.
• Feb 9th 2011, 06:13 PM
vaironxxrd
Quote:

Originally Posted by rtblue
I don't mind.

Thanks it would be great if someone could check my work. here it is.

http://img810.imageshack.us/img810/6...larity2.th.jpg
• Feb 9th 2011, 06:16 PM
rtblue
Looks good. Well done!
• Feb 9th 2011, 06:23 PM
vaironxxrd
Quote:

Originally Posted by rtblue
Looks good. Well done!

Thanks allot!