it is a triangle with circles at the corners, and squares in the middle of the corners. The squares have numbers in them, and you have to put numbers in the circles. However, the numbers in the circles have to add up to the number of the square between them. Simple, right?
To find the area of a polygon, you generally need to first calculate the perpendicular height of the shape, and then multiply this by the base length. Formulas will vary depending on the type of polygon (such as triangle, rectangle, etc.). For more complex shapes, you may need to divide the shape into simpler forms to calculate the area.