The fall of the Western Roman Empire typically. represents the beginning of the Middle Ages. Scholars divide the Middle Ages into. three eras: the Early Middle Ages (4 00â1000), the High Middle Ages (1 000â1300), and. the Late Middle Ages (1 300â1500).
For any triangle it is universal truth that addition of all three angles will be one eighty degree (1800). Mathematically, it can be expressed as: â p + â q + â r = 180Â°, If we are given two angles out of three then substituting these values, one angle can be calculated using above formula.
1 Remember that a triangle's 3 interior angles will add up to 180 degrees, no matter what the shape of the triangle. 2  This is the premise upon which the formula above can be built. 3  Draw a polygon on a sheet of paper. 4  For example, consider a square, which is a 4-sided polygon.