Then they both will have the same perimeter
no
False. The equation for area of a triangle is 1/2 base x height. The height and the base would have to be the same for two triangles to have the same area.
two isosceles triangles with common line
Yes. With suitable choice of lengths a triangle can have any area.
I believe so, though I am not sure I can prove it.
Then they both will have the same perimeter
yes they have same area
Only if the two triangles have the same base and height then they have the same area, because an area of a triangle OS the base times the height divided by two.
5, 12, 13 and 6, 8, 10
no
If the sides are in cm, then you would multiply the length of the shape by the width, which equals area. And area is in the unit of the sides but squared. So in this example it would be cm2. ========================================= The answer to the question is: You can't. The perimeter doesn't tell you what the area is. You can have two different drawings with the same perimeter and different areas, or with the same area and different perimeters. Even if they're both triangles, or both rectangles, etc. You can't take perimeter and 'work out' area from it.
False. The equation for area of a triangle is 1/2 base x height. The height and the base would have to be the same for two triangles to have the same area.
Yes.
no
yes
There is no standard relationship between perimeter and area. For example, you can have two rectangles that have the same perimeter, but different area.