In the adjacent figure, AB = 3 cm, AC = 8 cm, BE = 4.5 cm, then CD = ……

If $\mathrm{△}ABC\backslash triangle\; ABC$ ~$\mathrm{△}DEF\backslash triangle\; DEF$ and area $(\mathrm{△}ABC)(\backslash triangle\; ABC)$ : area $(\mathrm{△}DEF)(\backslash triangle\; DEF)$ = 49 : 100. Then DE : AB = …………

In $\mathrm{△}ABC\backslash triangle\; ABC$, $\overline{DE}\parallel \overline{BC}\backslash overline\; \{DE\}\; \backslash parallel\; \backslash overline\; \{BC\}$  and $\frac{AD}{DB}=\frac{3}{5}\backslash frac\{AD\}\{DB\}\; =\; \backslash frac\{3\}\{5\}$ ,AC = 5.6, then AE =

$\mathrm{△}ABC\sim \mathrm{△}PQR,\mathrm{\angle }A\backslash triangle\; ABC\; \backslash sim\; \backslash triangle\; PQR\; ,\; \backslash angle\; A$ = 50°, then $\mathrm{\angle }Q+\mathrm{\angle }R\backslash angle\; Q+\; \backslash angle\; R$ =

Area of regular hexagon of side ‘a’ units is …………….. sq. units

If $\mathrm{△}ABC\sim \mathrm{△}DEF\backslash triangle\; ABC\; \backslash sim\; \backslash triangle\; DEF$ , BC = 4 cm, EF = 5 cm area of $\mathrm{△}ABC=80\backslash triangle\; ABC\; =\; 80$ $c{m}^{2}cm^2$ , then area of $\mathrm{△}DEF=\mathrm{.}\mathrm{.}\mathrm{.}\mathrm{.}\mathrm{.}\mathrm{.}\mathrm{.}\mathrm{.}\mathrm{.}c{m}^2\backslash triangle\; DEF\; =\; .........\; cm^2$ .

In a square, the diagonal is ……………… times of its side.

In a quadrilateral ABCD, if AB = CD, BC = AD and $AC\mathrm{\ne }BD,AC\; \backslash neq\; BD,$ then ABCD is ………

In $\mathrm{△}PQR,\mathrm{\angle }R\backslash triangle\; PQR,\; \backslash angle\; R$ = 90° then hypotenuse is …………

$\mathrm{△}ABC\sim \mathrm{△}DEF\backslash triangle\; ABC\; \backslash sim\; \backslash triangle\; DEF$ if $\mathrm{\angle }E+\mathrm{\angle }F\backslash angle\; E\; +\; \backslash angle\; F$ = 130° then $\mathrm{\angle }A\backslash angle\; A$ = ...........