直角三角形

• 十(ten; vertical)ASSOCIATIVE
• 目(eye)RADICAL
• 一(one; straight line)ASSOCIATIVE

An eye looking straight down one line without deviation is what makes something upright and straightforward.

• ⺈(blade (upper part); blade edge (top))ASSOCIATIVE
• 用(use; employ)ASSOCIATIVE

A sharp horn like a knife blade is used for stabbing, resembling the pointed horn of an animal.

• 一(one; horizontal stroke)ASSOCIATIVE
• 二(two (pictograph – two horizontal strokes))ASSOCIATIVE

Three horizontal strokes stacked on top of each other symbolize the number three.

• 开(open; mold; form)ASSOCIATIVE
• 彡(stroke; line)RADICAL

Shape is lines drawn on a frame opening before the eyes.