abc and cda
A rhombus.
Four.
you can't, because the Pythagorean theorem is for right triangles and the triangles formed by the diagonal of a parallelogram are not right triangles.
33 triangles
Parellelogram
Two congruent triangles.
Figure that are congruent are shapes are the same size and shape. So when two formed congruent triangles are both together they fit just right.
If the triangles are congruent and you match the hypotenera the right way, you can get a rectangle. If the triangles are not congruent, you can't even necessarily get a quadrilateral.
A rhombus.
True.
Correct
yes
4
Four.
There are two types of quadrilaterals that are formed when two congruent equilateral triangles are joined. These shapes are rhombus and parallelogram.
A kite is a quadrilateral with two distinct pairs of adjacent sides that are congruent. In terms of triangles, a kite can be formed by two congruent right triangles sharing a hypotenuse, or by two congruent isosceles triangles sharing a base. Additionally, a kite can also be formed by combining two congruent scalene triangles with a shared side.
It can be, or one big triangle and two small congruent ones, or ... There are infinitely many options.