In a parallelogram abcd, ac ~ bd . is abcd a rectangle ?

Yes

Step-by-step explanation:

ABCD is  a parallelogram

By definition of parallelogram

AB=CD, BC=AD

...(given)

AB=AB

Reflexive property

AD=BC (By definition of parallelogram)

ABCABD

Reason: SAS postulate

Reason:CPCT

We know that  in parllelogram

Sum of same side interior angle=180 degrees

We know that

Opposite angles of parallelogram are equal

In rectangle , Opposite sides of rectangle are equal and each angle is of 90 degrees.

Therefore, by definition of rectangle

ABCD is a rectangle.

Hence, proved.

fahrenheit

step-by-step explanation:

fahrenheit is more precise than celsius. the ambient temperature on most of the inhabited world ranges from -20 degrees fahrenheit to 110 degrees fahrenheit—a 130-degree range. on the celsius scale, that range is from -28.8 degrees to 43.3 degrees—a 72.1-degree range. this means that you can get a more exact measurement of the air temperature using fahrenheit because it uses almost twice the scale.

the answer is the third / last answer

step-by-step explanation: