No, they aren't. Many sites use the word "wiki," but they are not related to each other or part of the same company. They do all use the wiki concept of letting regular people build the content and improve the site.
* Wikipedia * WikiHow * WikiAnswers
No; wikiHow is its own wiki (a how-to manual, like Wikipedia is an online encyclopedia, and WikiAnswers is a QA site, etc.).
There are countless wikis on the web but some of the most popular ones are: WikiHow Wikipedia Wikia Wetpaint Wikispaces WikiHow PBwiki CollegeWikis
You can be any age but in wikihow you have to be at least 13
Wikipedia, Wikitionary, Wikiquote, Wikibooks (including Wikijunior), Wikisource, Wikimedia Commons, Wikispecies, Wikinews, Wikiversity,MetaWiki, wikiHow, WikiAnswers, Uncyclopedia, Encyclopedia Dramatica, MarvelWiki, Bulbapedia, GuildWiki, Left4Dead Wiki, SleepWiki, YugiohWiki, to name a few of the most popular wikis.
Jack Herrick is the founder of wikihow
wikiHow was made in January 15, 2005.
You can answer a question on Wikihow by posting an article on their website.
Jack Herrick. (Founder of WikiHow), made wikiHow on: Jul 25, 2006
WikiAnswers Is Not Part of Wikipedia...But it uses the same concept - a Wiki.A wiki refers to information that is dynamic, open to change, constantly being improved, and based on user-generated content. Wikipedia is a wiki-based encyclopedia, whereas WikiAnswers is a wiki-based Q&A community and site.
Despite the same "wiki" prefix, WikiAnswers and Wikipedia are not owned by the same companies. WikiAnswers is owned by Answers.com, while Wikipedia is owned by the Wikimedia Foundation.
I wrote an article on this on WikiHow. Check it out by searching "How to bug your teacher" on WikiHow.