3
That depends on the size of the pentagon, and whether it is regular or not. In general, you can divide the pentagon into three triangles, and calculate the area of each triangle separately.
Similar triangles
congruent triangles
You can make a square, a rhombus, a parrallelogram, a kite, a rectangle, and a trapezoid. If you were to make all these shapes out of two triangles, you would have to have different sized triangles for most of them. If you put the bottoms of both of them together, it will make a diamond shape. But they would have to be the same size.
depends on what size triangles and what kind of triangles?
similar
Similar
infinite amounts of isosceles triangles as any length can be any size, just in the same ratio to each other.
Congruent Triangles have the same angles and side length measures
No. A regular polygon has all sides the same length and all angles the same size. A regular pentagon has 5 angles each 108 degrees. A house-shaped pentagon does not have all angles the same size, so therefore it cannot be regular.
It depends entirely on the size of the triangles and the size of the square.
Same dimensional shape and same size angles.