Right trapezoid

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Semi-protected: This is a redirect from a title that is semi-protected from editing for any of several possible reasons.
- Please do not replace these redirected links with links directly to the target page unless expressly advised to do so below or elsewhere on this page, or if the change is supported by a policy or guideline.

To a section: This is a redirect from a topic that does not have its own page to a section of a page on the subject. For redirects to embedded anchors on a page, use {{R to anchor}} instead.

When appropriate, protection levels are automatically sensed, described and categorized.