Category: STD09
Lines and angles – Summary
If a ray stands on a line, then the sum of the two adjacent angles so formed is 180° and viceversa.This property is called as the Linear pair axiom. If two lines intersect each other, then the vertically opposite angles are equal. If a transversal intersects two parallel lines, then(i) each pair of corresponding angles…
STD09 Topics
Maths Number system Polynomials Coordinate geometry Linear equations Introduction to Euclid’s geometry Lines and angles Triangles – Criteria for congruent triangles Quadrilaterals | Sketch Notes | Herons formula | Sketch Notes | Areas of parallelogram and triangles Circles Constructions Surface area and volume Statistics Probability Science Matter in our surroundings Is matter around us pure…
Arithmetic Progressions
nth Term of Arithmetic progression: Concept Map Sum of n terms of A.P. concept map
Congruent vs Similar Triangles
Presented by Pranav, Yogesh, Rohit and Aswin Conditions of congruent triangles Corresponding angles are equal. Corresponding sides are equal. Conditions of similar triangles Corresponding angles are equal. Corresponding sides are proportional.