pythagoras (c.570 bc-after 510 bc), greek philosopher and mathematician - 薩默斯 愛琴島 幅插畫檔、美工圖案、卡通及圖標畢達哥拉斯
plain simple pastel white coloured crumpled crushed paper horizontal vector backgrounds and one turquoise blue colored right angled triangle abc geometric shape with copy space and angle marked 90 degrees and pythagoras theorem mathematical formula text - 薩默斯 愛琴島 幅插畫檔、美工圖案、卡通及圖標數學, 數學符號, 三角形
