It would depend on the triangles, but assuming they were equilateral or isosceles, a trapezoid if alternated in a line.
The Great Pyramids at Giza are, but the Meso-Americans were truncated.
Absolutely. Any two congruent right triangles will form a rectangle, and if the right triangles are isosceles right triangles, they will form a square.
triangles , polygons ,quadrilaterals
Inscribed triangles in a rectangle are identical right triangles but they are rotated 180 relative to each other.
It would depend on the triangles, but assuming they were equilateral or isosceles, a trapezoid if alternated in a line.
An isosceles triangle can be divided into 4 smaller, identical isosceles triangles. Each of these can then be divided into 4, and each of them ... So, the answer to the question is infinitely many.
The Great Pyramids at Giza are, but the Meso-Americans were truncated.
In general, a parallelogram. But if the triangles are joined along their odd side, a rhombus.
There are normally no parallelograms within an isosceles triangle unless you put them there yourself.
Absolutely. Any two congruent right triangles will form a rectangle, and if the right triangles are isosceles right triangles, they will form a square.
20 isosceles triangles with each base being a side of the 20-gon, and the opposite vertices at the center of the polygon.
If you have 2 EQUILATERAL triangles, and you stack them on their respective hypotenuses, the result: SQUARE. If you have 2 ISOSCELES triangles, and you stack them on their respective hypotenuses, the result: RECTANGLE. If you have 2 OBTUSE triangles, and you stack them on their respective hypotenuses, the result: PARALLELOGRAM.
It can be, if all the vertices of the pentagon are joined to its centre. But if they are joined to any other point, it will not be.
triangles , polygons ,quadrilaterals
Inscribed triangles in a rectangle are identical right triangles but they are rotated 180 relative to each other.
Yes. You can always draw a "diagonal" line between opposite corners of any four-sided figure. Then, cutting along that line, you wind up with two triangles out of which the figure could have been made.