The answer depends on what information is given.
Base-rate information in psychology refers to knowledge about the likelihood of an event occurring in a general population. It serves as a useful frame of reference for making judgments and decisions. Failure to consider base rates can lead to inaccurate assessments or decisions.
You need more information before you can calculate the base.
Only the base in not enough information. You can find the area if you are given the other two sides, or two angles, or a side and an angle, or measures of other features. However, the answer depends on the information given and the formula is likely to be different in each case.
It is not possible to answer the question with the information that is given.
Given only the information in the question, there is no option but to measure the pentagon at the base and calculate its area.
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Not enough information. The volume is the base area times the height; the height is therefore the volume divided by the base area.
Assuming the lengths of the sides are given, then perimetrer = base + 2*leg If the sides are not given, then the answer will depend on what information is provided.
Insufficient information given on which to base an answer.
It would help to know what shape you are talking about. But since you have not bothered to provide that information, I cannot provide a sensible answer.
this works on equilateral where it would be base sqaured divided by two. otherwise you need another piece of information to solve which does not have to be height