In the rhombus ABCD, AB = 6 cm, then $A{C}^2+B{D}^2=AC^2\; +\; BD^2=$

$\mathrm{△}ABC\sim \mathrm{△}PQR\backslash triangle\; ABC\; \backslash sim\; \backslash triangle\; PQR$ AB = 6, BC = 4, AC = 8, PR = 6, then PQ + QR =

Two figures are said to be similar if they have same

Two polygons with the same number of sides are similar if

Which of the following are not similar?

In $\mathrm{△}ABC,DE\parallel BC,\backslash triangle\; ABC,\; DE\; \backslash parallel\; BC\; ,$ then

The adjacent figures state ………………… criterion of similarity.

$\mathrm{△}PQR\backslash triangle\; PQR$ is formed by joining the midpoints of the sides of $\mathrm{△}ABC\backslash triangle\; ABC$, then the ratio of the areas of $\mathrm{△}PQR\backslash triangle\; PQR$ and $\mathrm{△}ABC\backslash triangle\; ABC$ is

Which of the following is not the sides of a right triangle ?

In $\mathrm{△}ABC,B{C}^2+A{B}^2=A{C}^2,\backslash triangle\; ABC,\; BC^2\; +\; AB^2\; =\; AC^2\; ,$ then ........ is a right angle.