104k views
4 votes
what is a counterexample for the following conjecture if a counterexample does not exist choose not possible conjecture all quadrilaterals are rectangles

2 Answers

3 votes

Answer:

a trapezoid is a quadrilateral and it is not a rectangle

Explanation:

User Taras Kravets
by
7.8k points
3 votes

Counter example:- a trapazoid is a quadrilateral which has only one pair of parallel sides unlike a rectangle which has 2. So the conjecture is false.

User Lockyer
by
8.3k points