Yes.
2 triangles and 3 rectangles
they are a polygon
Rectangles are not squares. The reason to this is because squares must have sides of equal lengths. Rectangles are quadrilaterals with sides that join to make 90 degree angles, but are not restricted to having the same length. Therefore "all squares are rectangles", but rectangles cannot be squares.
There are six rectangles, consisting of three pairs of congruent rectangles.
You can make 9 triangles but NOT rectangles.
They make two congruent rectangles, not to rectangles! This is because the line joining the midpoints of opposite sides are lines of [reflective] symmetry.
You could make 5 rectangles with 10 squares
2 rectangles. Put two toothpicks on 2 sides and one on the other side, and that uses 6 toothpicks and if you make another rectangle like that you make 2 rectangles.
You can make three rectangles. Remember that a square can also be a rectangle.5x14x23x3
Yes.
Yes.
Yes.
2 triangles and 3 rectangles
You need 4 rectangles and two squares * * * * * No, you do not need to have squares: there can be six rectangles - as in a brick shape.
rectangles have 4 right angles and 2 parallel sides
Yes.