Library / CEMC Gauss (Grade 8) /186 of 525

CEMC Gauss (Grade 8), 2002

Algebra Difficulty 1.0 Junior Find the answer Canada

Which of the following statements is not true?

(A) A quadrilateral has four sides. (B) The sum of the angles in a triangle is $180^\circ$ . (C) A rectangle has four $90^\circ$ angles. (D) A triangle can have two $90^\circ$ angles. (E) A rectangle is a quadrilateral.

We don't reproduce this publisher's solutions. Their own solution is here — work the problem first.

Want a route through all this instead of an archive? The track puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.

Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.