• Lesson Objectives. • The introduction of new concepts heights, medians and bisectors of a triangle. • The development of logical thinking of students. • Formation of stable cognitive interest to the study of geometry.
• Lesson Plan : • • • Organizing time. An explanation of new material and fastening in problems. Questions Give homework. Summing up the results of the lesson.
• The segment connecting the vertex of the triangle to the middle of the opposite side of the triangle is called the median. • B K - triangle median • In any triangle the medians intersect at one point. triangle median
triangle bisector • The bisector of the triangle - the segment bisector angle of the triangle, • connecting the apex of the triangle with the point on the opposite side. • Please note that the bisector of the angle - a ray that divides the angle • equal to two, and the bisector of the triangle - is cut, part of the beam, • limited side of the triangle.
• Each triangle can be carried out • Three bisectors that intersect at a single point, • usually denoted Latin letter I. • The point of intersection of the bisectors of the triangle (I) • Center the incircle.
• The height of the triangle - the perpendicular drawn from the vertex triangle to the line containing the opposite side. The height of the triangle
