select the twrm that best describes the statement. all lines are straight or a tringle. hs four sides. conjuction, disjunction, negation, conditional

Hello.

The statement is a negation because the sentence is false. All angles are NOT right angles and triangles do NOT have four sides.

The answer is: negation.

if a statement is false, then its negation is true. The given statement above is false, therefore, it is a negation of the true statement.

Have a nice day