Look at the square below:
What types of triangles do the diagonals in the square form?
Look at the square below:
What types of triangles do the diagonals in the square form?
The diagonals of the square intersect each other, so the four triangles are isosceles. Moreover, since the diagonals are perpendicular to each other, the diagonals form four right-angled triangles. Therefore, the correct answers are A+C
Answers (a) and (c) are correct.