The incentre of a circle is also the center of the circle which touches all the sides of the triangle. The point of intersection of internal bisectors of the angle of a triangle is called incentre. The meeting point (O) of the altitudes AD, CF and BE of the triangle is called the orthocentre. The point of intersection (or concurrence) of the three altitudes of a triangle is called its orthocentre. The side BC is called the base of the triangle. In the triangle, ABC, the perpendicular drawn to BC, that is AD is the altitude. The length of the perpendicular from a vertex to the opposite side of a triangle is called its altitude, and the side on which the perpendicular is drawn is called it's base. Here, the midpoint of the medians AD, BE and FC is the centroid of the triangle ABC. The centroid of a triangle is the point of intersection of the three medians of a triangle. In other words, a triangle can have three medians. Similarly, a median can be drawn from the midpoint of BC as well as CA. Thus AD forms the median of the triangle ABC. Terms Related To Triangles:Ī line segment joining a vertex of a triangle to the midpoint of the opposite side of the triangle is called a median. Also, no triangle can have two angles more than 90 degrees as it won’t make a triangle. Note: No angle should be zero degrees or 180 degrees as it would make a straight line rather than a triangle. The most basic fact about the triangle is that the sum of all the interior angles of a triangle is always 180 degrees. The minimum number of corners required to make a polygon is three because one or two corners cannot make a closed shape. Polygons are closed, flat, two-dimensional shapes having many corners. In other words, we can say that a Triangle is the simplest polygon. A triangle consists of three sides, three vertices and three angles. What is a Triangle?īy definition, a triangle is a two-dimensional shape having a flat surface that can be drawn on a piece of paper. Thus, the ratio of the sides of the bigger and smaller triangle is always constant. Two triangles have the same angles but the different lengths of sides are called similar triangles. The angles can be less than, more than or equal to 90degrees. Similarly, a triangle can either have all angles the same or all angles different. A triangle can have all sides the same or all sides different. There are different types of triangles based on the sides and angles of triangles.
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