Which of the following is a counter example for the hypothesis all parallelogram are rectangle

A non-square rhombus is not a rectangle.

Step-by-step explanation:

A parallelogram is a quadrilateral (four-sided figure) that has two pairs of parallel sides.

A rectangle is a parallelogram with four right angles.

If a parallelogram does not have four right angles, then it is not a rectangle.  However it is still a parallelogram, as it has two pairs of parallel sides.

⊂⊃⊂⊃ω

step-by-step explanation:

i hope this : )

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.