Based on the information in the diagram, determine whether the figure is a parallelogram. if so, select the answer with the correct justification.

a. no
b. yes, both pairs have opposite angles are congruent.
c. yes, both pairs of opposite sides are parallel.
d. yes, both pairs of opposite sides are congruent.

D.yes, both pairs of opposite sides are congruent.

Step-by-step explanation:

Its opposite angles are also congruent.

In the given figure , we have a quadrilateral.

Since , the opposite sides of the quadrilateral are shown equal.

Therefore , we can say that the given figure is a parallelogram.

Hence, the correct answer is D.yes, both pairs of opposite sides are congruent.

answer:  

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step-by-step explanation: easy

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.