no
No. An isosceles trapezium (isosceles triangle with its apex removed) would have congruent diagonals but it is not a parallelogram.
Yes. Any triangle will tessellate.
It depends. Strictly speaking, a semi-regular tessellation uses two (or more) regular polygons and, since neither an isosceles triangle nor a parallelogram is regular, it cannot be a semi-regular tessellation. However, a less strict definition allows non-regular components.
isosceles triangle
Yes under certain dimensional conditions.
no
no
No, a regular isosceles triangle will not tessellate. In order for a shape to tessellate, it must be able to fit together with copies of itself without any gaps or overlaps. Regular isosceles triangles have angles of 90, 45, and 45 degrees, which do not allow for a repeating pattern that covers a plane without any spaces. Regular polygons that tessellate include equilateral triangles, squares, and hexagons.
NO!!!! A parallelogram has 4(four) sides. A Triangle has 3(three) sides.
isosceles triangle
They both have 3 sides.Both have at least 2 equal sides.They both have acute angles.Both are triangles.Both can tessellate.
No. An isosceles trapezium (isosceles triangle with its apex removed) would have congruent diagonals but it is not a parallelogram.
Yes.
Yes
Yes. Any triangle will tessellate.
Yes, any type of triangle or quadrilateral will tessellate.