ID 255760371 © Rudzhannagiev | Megapixl.com
Sharing is not just caring, it's also about giving credit - add this image to your page and give credit to the talented photographer who captured it.:
equation math board chalkboard quadratic vector chalk black green algebra exercise hand icon pythagorean background square symbol text theorem white back blackboard class decision design drawing education elementary geometric geometry illustration knowledge learning lesson object paper ruler school science solution student supplies mathematics calculate formula graphic lecture number problem addition