Write the converse of each of the following statements : If ABC is an equilateral triangle, then ABC is an isosceles triangle.

Write the negation of the following statements All triangles are not equilateral triangle

Write the negation of the following statement :- All triangles are not equilateral triangle.

Write the negation of the following statements. All triangles are equilateral triangles.

Write the converses of the following statement : If triangle ABC is equilateral, then all its interior angles are equal.

Write the contrapositive of the following statement : If a triangle is equilateral, it is isosceles.

ABC is an equilateral triangle ofside 2a. Find each of its altitudes.

O is a point in the interior of a square ABCD such that OAB is an equilateral triangle. Show that triangleOCD is an isosceles triangle.

Write the converses of the following statements. Also, decide in each case whether the converse is true or false. : If triangle ABC is isosceles, then its base angles are equal.