In ΔABC and ΔDEF ,∠B = ∠E , ∠F = ∠C and AB=2 DE ,then two triangles are

If ratio of areas of two similar triangles is 9:16 .Then ratio of their median is

In the given figure DE || BC and AD:DB = 2:3
The ratio of ^area(ΔADE) / _{area (ΔABC)} is

If in two triangles ,corresponding angles are equal,then their corresponding sides are in the same ratio and hence two

triangles are similar. Which similarity criterian is this ?

Which of the following is not true

All ______ triangles are similar .

The areas of two similar triangle are 81cm² and 49 cm² respectively.If the attitude of the first triangles is 6.3 cm then the corresponding attitude of the other is

If ABC is an acute angles triangle ,acute angled at B and

The areas of two similar triangles are respectively 9 cm² and 16 cm² .The ratio of their corresponding side is

If ratio of sides of two similar triangle is 5:4,then ratio of their perimeters is