mean in geometry

The word 'geometry' is derived from the Greek words 'geo' meaning 'earth' and 'metron', meaning 'measuring'. Geometry originated when man felt the need to measure his land. Ancient Egyptians were perhaps the first people to study geometry...

Draw m || l, draw n|| l. Measure the perpendicular distance between m and n at many points. We will find this to be same at all points. This means by the property of parallel line m||n. From the above activity we can conclude that "Two lines which are parallel to the same line, are par..

Triangle - A three sided closed figure is called a triangle. Here side means a line segment. ABC is a triangle. BC, CA, AB are its sides. They can be denoted by small letters a, b and c. The capital letters A, B and C denote the vertices of the triangl..

In a triangle when we refer to an angle, we mean the angle bounded by the two sides. The three angles lie in the interior region of the triangle. These angles are called the interior angles of the triangle. Now observe the triangle in which the sides are produced. As the triangle has ..

Interior and Exterior angles of a triangle - In a triangle when we refer to an angle, we mean the angle bounded by the two sides. The three angles lie in the interior region of the triangle. These angles are called the interior angles of the triangle. Now observe the triangle in which the..

Locus of a point equidistant from two intersecting lines - Draw two intersecting lines l and m intersecting at O. Draw OA the bisector of . Mark E on OA. Draw EB and EC perpendicular to OB and OC respectively. EB and EC are the distances of E from OB and OC respectively. Measure EB and EC and compa..

The position of the point P in a plane in the rectangular co-ordinate system is determined as follows: Draw PA and PB perpendicular to XX' and YY'. The segment OA = a measures the distance along the x-axis (the x-coordinate and the perpendicular distance AP = OB = b ( parallel to y - axis) measu..

Question: ABC is a right triangle, right angled at C. If P is the length of the perpendicular drawn from C to AB and a, b, c have the usual meaning, then prove that [3 Mark] i. ii. Answer: Proof of (i) (AA Similarity)..

In a triangle when we refer to an angle, we mean the angle bounded by the two sides. The three angles lie in the interior region of the triangle. These angles are called the interior angles of the triangl..

We are familiar with plane figures bounded by straight line segments as sides. They are known as Polygons. Polygon is a word of Greek origin. It means figure with many angles implying many side..