knowH2O

#Other irregular parallelograms, trapezia and quadrilaterals, quadrilaterals containing one or more rounded corners #Quadrilaterals with dark surfaces or parts of surfaces #Quadrilaterals containing representations of heavenly bodies or natural phenomena #Quadrilaterals containing one or more triangles or lines forming an angle (specify the content) #Triangular figures with one or more truncated or rounded angles #Triangles pointing downwards #Numerals juxtaposed or joined to a letter or a figurative element #Numerals presenting a special form of writing #Series of letters in different dimensions #Series of letters presenting different forms of writing #White, grey, silver #Blue #Green #Waves, sound and micro waves.