The article “Triangles and congruence: when three facts are enough”. back to the article

Sending a correction needs an account: the result of the check has to reach a person. Sign in

Chapter heading ?It narrows the search: in a long piece the same word appears in several sections. Click the field and the article's own headings are offered. Leave it empty in a short piece with no headings.

The sentence with the mistake * ?Copy the whole sentence the word sits in. The sentence is how we find the exact place, so the fuller it is the better — copying it straight from the article is the surest way.

The misspelled word * ?One word, exactly as it appears in the article. You do not need to write the correct form — the checker works it out. A whole phrase or several words will not be accepted.

Your report is checked as soon as it is sent: if the correction holds, the word is fixed in the text; if it does not, you will see why on this page.

Send