What is an Angle Angles are formed by two rays or lines called the arms or sides of the angle, sharing a common endpoint, called the vertex of the angle. Types of angles There are various types of angles. The angles can be classified into two main types. Basis on their measure or magnitude. Based […]
Read More →Parallelograms – Properties A parallelogram is a special type of a polygon. it is a quadrilateral with both pair of opposite sides are parallel. Properties 1. Opposite sides are equal. Opposite sides, AB = CD and AC = BD 2. Opposite angles are equal. Opposite angles are ∠A = ∠D and ∠B […]
Read More →The sum of the angles of a triangle is 180º Given: A triangle △ PQR and ∠1, ∠2, and ∠3 are angles of triangle △ PQR. To prove: ∠1 + ∠2 + ∠3 = 1800 Construction: Draw a line XPY parallel to QR passing through P. Proof: XPY ∥ QR and PQ is transversal ∴ ∠2 = ∠4 (Alternate angles) ….(1) XPY ∥ QR and PR […]
Read More →Acute Angle When two rays are joined together at a common point, an angle is formed. Definition: Acute angle: A angle whose measure is more than 0 degree and less than 90 degree is called a acute angle. ∠AOB is a acute angle, it’s measure 45º, which is less then 90 degree and more then […]
Read More →Angle – Definition – Geometry Definition: In plane geometry, angles are formed by two rays or lines called the arms or sides of the angle, sharing a common endpoint, called the vertex of the angle. Angle Symbol An angle is represented by symbol ∠ Angles are measured in degree, which is unit of angle using […]
Read More →Similar Polygons Two polygons are similar if they have same shape, but not the same size. Similar polygons are polygons, if their corresponding angles are congruent, and the measure of their corresponding sides are proportional. The ratio of length of their corresponding sides are all in a constant ratio, and their corresponding angles are equal. […]
Read More →Regular polygon A polygon which has all sides are congruent(equal) and all angles are congruent (equal) is known as a regular polygon. If a triangle has all the sides are same and all the angles are same then it is a equilateral triangle or a regular triangle. If a quadrilateral has all the sides are same […]
Read More →Polygons – Classification We classify polygons to the number of side orvertices based they have. A polygon can be classified by it’s number of a sides and measure of angles. First, we classify by it’s number of a sides. Classified by measuring the sides The name of a polygon usually […]
Read More →Congruent Figures In our daily life we see many congruent objects like as, (i) Two 2 Rupees, 5 Rupees, or 10 Rupees coins. (ii) Two text books of mathematics of same class. Two figures or objects are called congruent, when one object cover the other completely and exactly. This means that two books or coins […]
Read More →Geometry practice on circle Here, we will practiced and discussed the questions on circle. Fill in the blanks. (1) The common point of a tangent and the circle is called …….. (2) A circle may have …….. parallel tangents. (3) A tangent to a circle intersects it in …….. point. (4) A line intersecting a […]
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