Write the contrapostive , If a triangle is equilateral then it is isosceles ?

Write the negation of " All triangles are not equilateral triangle "

Write the converse and decide whether the converse is true or false. (i) If triangle ABC is isosceles, then its base angles are equal.

If the lengths of the sides of a triangle are decided by the three thrown of a single fair die,then the probability that the triangle is of maximum area given that it is an isosceles triangle, is

There are some statements given below. Write whether they are true or false : Two equilateral triangles with their sides equal are always congruent.

The three vertices of a triangle are represented by the complex numbers 0 , z_(1) and z_(2) . If the triangle is equilateral , then :

Fill in the blanks using the correct word given in the brackets: All ________ triangles are similar. [isosceles, equilateral].

S_(1) and S_(2) are the foci of an ellipse and B is the end of the minor axis. If the triangle S_(1) S_(2) B is an equilateral triangle, then eccentricity of the ellipse is

Prove that the ratio of the area of a circle and the equilateral triangle whose side is equal to the diameter of the circle is pi:sqrt3