Dancers in a stage floor follow a choreography as shown in the circle below. Letters from A to E represent the dance sequence of the choreography proposed by the dance teacher and in order to make it as precise as possible, the teacher measures the angles formed by the distances between the points. Therefore, what is the value of ∠BED? ∠BCD = 57.6° and arc length mBD = 123°.

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.

unless if u could do my questions, if not i wouldn't want to

step-by-step explanation:

step-by-step explanation:

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