
Kenneth S. answered 12/10/17
Tutor
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Algebra II EXPERT will help you survive & prosper
Exams are stressful when you go into them with doubts about your knowledge.
Doubts about knowledge are a function of your level of study.
To prepare for an exam on polygons, you should review, over and over, until you can repeat with accuracy and assurance, various definitions of key words in geometry (such as regular, isosceles) and definitions and properties.
You should make flashcards, from summary tables of properties. Examples: squares are special kind of rectangles; rhombus has all 4 sides equal and its diagonals are perpendicular and bisect one another and its opposite angles are equal (or congruent, if you prefer). All squares are rhombuses, but the converse is not true (i.e. not all rhombuses are squares).
Parallelograms have opposite pairs of sides congruent (equal) and rhombuses, rectangles, and squares are parallelograms, but some parallelograms are none of those three things.
Formulas for areas of various kinds of polygons are important, e.g. area of trapezoid is "average base" times height, i.e.
= ½(b+B)h.
REVIEW, REVIEW, REVIEW--and try to control your math anxiety because that is surely a waste of psychic energy.