Update 1.md

Update 1.md

update LoopingaTriangle.

change "A" to "a"

change “A” to "a"

change the "9亿亿" to "9000 万亿"

Update 4.md

Update 14.md

image重复定义.

修正Object单词拼写错误

不规则四边形=>梯形