For the problem
side A...x+3...
side B...2x+1
side C...6
would X+3+2x+1+6=180
be correct?
2006-11-16 09:29:28 · 8 answers · asked by mbtafan 3 in Science & Mathematics ➔ Mathematics
two angles on the base are equal
2006-11-16 09:34:08 · update #1
These aren't angles, so it won't equal 180. These are the measurements of each side, but given with variables.
Perimeter = side A + side B + side C
You just add the terms.
Perimeter = (x + 3) + (2x + 1) + 6
Now group your x terms and your unit terms:
Perimeter = (x + 2x) + (3 + 1 + 6)
Now simplify:
Perimeter = 3x + 10
There's your perimeter --> 3x + 10
BONUS INFO:
And if they had continued the question and said the perimeter was 40, you should be able to figure out the sides...
40 = 3x + 10
3x = 30
x = 10.
Side A = x + 3 = 13
Side B = 2x + 1 = 21
Side C = 6
For your question though, the perimeter is:
3x + 10
2006-11-16 09:33:43 · answer #1 · answered by Puzzling 7 · 1⤊ 0⤋
The perimeter of a triangle is: side a + side b + side c. It really has nothing to do with the angles, which is where I think you got your answer from (seeing the 180°).
Perimeter = (x + 3) + (2x + 1) + (6)
p = 3x + 10
And that is about as far as you can go, leaving the answer in terms of "x".
--- Note: Your answer would be correct if you were trying to find the measure of the angles of a triangle. ---
--- Which of the sides (a, b, or c) is the base? I just read you additional details, and this may be solvable... ---
With the two angles congruent, this means that the two sides (not the base) are equal in length.
If b is the base, this means that x + 3 = 6, and that x = 3. This would make the base (b) equal to 7. So the perimeter would be: 6 + 6 + 7 = 19 units. This is only true if the base is "b".
2006-11-16 17:34:01 · answer #2 · answered by Anonymous · 0⤊ 0⤋
In order to find out the perimeter you would either have to be given an angle or some sort of indicators to show that the angles are equal. Does the question state if it is equilateral or not. Does it have a 90 degree angle? That would be the only way to solve the perimeter for a triangle.
2006-11-16 17:33:03 · answer #3 · answered by Anonymous · 0⤊ 0⤋
x+3+2x+1+6 = 3x + 10
2006-11-16 17:59:41 · answer #4 · answered by David N 1 · 0⤊ 0⤋
no b/c 180 would be the sum of the 3 angles.
so perimeter (the sum of the sides) = A + B + C
2006-11-16 17:34:54 · answer #5 · answered by Pony 2 · 0⤊ 0⤋
no its wrong
sum of angles is 180
but not the sides
to find perimeter just add thier lengths
i.e,
perimeter=3x+10
2006-11-16 17:35:53 · answer #6 · answered by . 3 · 0⤊ 0⤋
no. you simply add the sides together to find the perimeter. so the answer would be 3x+10.
2006-11-16 17:31:13 · answer #7 · answered by Christine 2 · 1⤊ 0⤋
just add them
thats 180* (degrees) not the perimeter.
it would be...
3x + 10
2006-11-16 17:37:53 · answer #8 · answered by drizzttownz 2 · 0⤊ 0⤋