For the Love of Hanzi - Radicals 1-5 (Sets: 1 of 30)

zhǔ 'dot'

Strokes: 1 Examples: 之 为 头

yī 'one'

Also means a, an

Strokes: 1 Examples: 于 下 上

shù 'down'

Strokes: 1 Examples: 中 北 冉

piě 'left'

Strokes: 1 Examples: 九 乃 千

yǐ 'twist'

Also: 乛 乚, the top and side of 刁

Also means Heavenly Stem, an old character for Fish Guts.

Strokes: 1 Examples: 乞 乡 以

Sources: http://www.kzxy.com.cn/Article/ArticleShow.asp?ArticleID=17116#%E4%B8%80%E7%94%BB%EF%BC%885%EF%BC%89 / William McNaughton Reading and Writing Chinese. Tuttle Langauge Library / http://en.wiktionary.org/wiki/Index:Chinese_radical#1_stroke / http://www.geocities.com/tokyo/pagoda/3847/flux/radscheme.htm