In Euclidean geometry the sum of the angles of a triangle is equal to two right angles (180Â°). If all three angles of a triangle are equal, the triangle is called equilateral. An isosceles triangle has two equal angles. A scalene triangle is one in which all three angles are different.
A period, or menstruation, is the shedding of the endometrium-the uterine lining. Menstruation is also known as menses. All female humans, as well as some other female mammals, have regular periods during their reproductive age. Menstruation which includes bleeding from the vagina is found mainly among humans and similar animals, such as primates.
As you probably learned back in middle school, menstruation is the monthly shedding of your uterine lining. Though it can be uncomfortable and sometimes inconvenient, your period is your body's way of telling you that your reproductive system is working properly. Just as every woman is unique, every woman's period has its own personality. Some periods are short, others are long. Some are heavy, others are light.