What is the perimeter of a polygon 8cm 6cm, 4cm, 6cm

Hello there,it will only be somewhat eroded (25%)hope this : ))~top

The main types of electromagnetic radiation. radio  waves have  the lowest frequencies  and  longest  wavelengths, while gamma  waves have highest frequencies  and shortest wavelengths. the wavelengths vary across the electromagnetic spectrum from about 10–15 m to more than 104 m.hope it !