Answer:
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Check the picture below.
make sure your calculator is in Degree mode.
The additional information needed to determine that ABCD is a parallelogram is: A. AB ≅ CD.
<h3>How to Identify a Parallelogram?</h3>
One of the criteria for proving that a quadrilateral is a parallelogram is that one of the pairs of opposite sides are congruent and also parallel to each.
We are already given that side AB is parallel to side CD, therefore, the additional information we would need to prove that quadrilateral ABCD is a parallelogram is: A. AB ≅ CD.
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Answer:
as we know, the integral of 
is 
so, the integral of x.
will be found as follows:
here, we will use a trick called 'integration by parts'
let x = u and = v
∫uv dx = u∫v dx - ∫[(du/dx)* ∫v dx] dx
∫x. dx = x∫ - ∫[(dx/dx) * ∫ dx ] dx
∫x. dx = x*
- 1 * 
= 
( x - 1 )
