3 years ago

Which counterexample shows that the conjecture "Every parallelogram is also a rectangle" is false?

Mathematics

2 answers:

saveliy_v [14]3 years ago

5 0

A parallelogram without four right angles would prove that to be false.

kkurt [141]3 years ago

4 0

Yep that'd be false since they are also rectangles

You might be interested in

Factor this expression completely ab + 4 + a + 4b

MrRa [10]

ab + a + 4b+4 = a(b+1) + 4(b+1) = (b +1)(a + 4)

5 0

3 years ago

What are the zeros of the polynomial function? <br><br> F(x)= x^2 + 12x +20

vampirchik [111]

Answer:

Step-by-step explanation:

$F(x)=x^2+12x+20\\\\\text{The zeros:}\\\\F(x)=0\iff x^2+12x+20=0\\\\x^2+2x+10x+20=0\\\\x(x+2)+10(x+2)=0\\\\(x+2)(x+10)=0\iff x+2=0\ \vee\ x+10=0\\\\x+2=0\qquad\text{subtract 2 from both sides}\\\boxed{x=-2}\\\\x+10=0\qquad\text{subtract 10 from both sides}\\\boxed{x=-10}$