### Class X Math Notes for Triangles

**Basic Concepts with Examples**

**• SIMILAR TRIANGLES.**Two triangles are said to be similar if

(i) their corresponding angles are equal and

(ii) their corresponding sides are proportional.

• All congurent triangles are similar but the similar triangles need not be congruent.

• Two polygons of the same numbers of sides are similar, if

(i) their corresponding angles are equal and

(ii) their corresponding sides are in the same ratio.

**• BASIC PROPORTIONALITY THEOREM.**In a triangle, a line drawn parallel to one side, to intersect

the other sides in distinct points, divides the two sides in the same ratio.

Useful & easy to understand contain....

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