2006-10-06 03:19:29 · 14 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
b) 3,4 7 bacause 3+4 =7. They form a straight line'
2006-10-06 03:21:58 · answer #1 · answered by Mein Hoon Na 7 · 2⤊ 0⤋
Everybody so far has been correct in say that b is not a triangle because 3+4 = 7 and in order to make a triangle you have to have the sum of two sides greater than the third side.
However, I have to write an answer here in order to respond to something "Truth" said above that is making me go insane.
5,5,5 is an equilateral triangle, because in an equilateral triangle all three sides are equal. The last time I checked 5=5=5 so the first triangle you have is in fact an equilateral triangle.
a^2+b^2 = c^2 is not a test for creating a triangle. It's the formula for the Pythagorean Theorem, that will test if the triangle is a right triangle, since the Pythagorean Theorem only works for right triangles.
I know this is not what you were really asking about, but since I've been teaching this stuff for 8 years now, I just had to put this answer in to dispute what Truth wrote about the first triangle.
Good Luck.
2006-10-06 10:48:43 · answer #2 · answered by SmileyGirl 4 · 0⤊ 0⤋
b) 3,4,7.
5,5,5 would be an equillateral triangle. One way to always test this is pick any two side lengths and add them up, they should always equal more than the third.
7+4=11>3; 3+7=10>4; 3+4=7not>7 so not a triangle.
2006-10-06 10:23:13 · answer #3 · answered by Anonymous · 2⤊ 0⤋
letter b) 3,4,7 . There is a theorem that the sum of two sides of a triangle should be GREATER than the last side.
Since 3+4>7 is FALSE, therefore it's not a triangle (the end of one side will not meet if you try to draw it).
2006-10-06 10:24:36 · answer #4 · answered by lune_ellise 3 · 0⤊ 0⤋
The longest side cannot be the sum of the other two sides.
Since, 3 + 4 = 7, it cannot form a triangle.
2006-10-06 10:51:45 · answer #5 · answered by Mermaid♥ 3 · 0⤊ 2⤋
3, 4, 7 does not. the two small sides have to be larger than the third.
2006-10-06 17:31:13 · answer #6 · answered by Michele P 2 · 0⤊ 1⤋
Shoot, I apologise. I was wrong. I got right triangle in my head for some reason. A tunnel vision thing I guess. Heck, I read the post by the teacher and thought, that is not what I wrote, but after looking, sure enough, I did!
Again, I apologise for the misthought.
2006-10-06 10:34:49 · answer #7 · answered by Truth 2 · 0⤊ 3⤋
the longest side can't be equal to the sum of the other two sides... so B
2006-10-06 10:23:06 · answer #8 · answered by Anonymous · 0⤊ 0⤋
b
the third side cant be equal or greater than the sum of other two sides
2006-10-06 10:28:14 · answer #9 · answered by abhisebastian 1 · 0⤊ 2⤋
b
as,the third side cannot be equal or greater than the sum of other two sides.
2006-10-06 10:35:49 · answer #10 · answered by Amit Bajaj 2 · 0⤊ 2⤋