Question

10th maths notes of chapter triangle exercise
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Answer 1

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.

• CONVERSE OF BASIC PROPORTIONALITY THEOREM. If a line divides any two sides of a triangle in the same ratio, the line must be parallel to the third side.

I HOPE YOU WILL UNDERSTAND THIS.