Similarity
Maharashtra Board · Class 10 · Mathematics
Summary of Similarity for Maharashtra Board Class 10 Mathematics. Key concepts, important points, and chapter overview.
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Overview
Notice how one triangle can match another in shape even when the size changes. Count the matching angles first, then compare the corresponding sides. Similarity links angle facts, side ratios, and area ratios into one clear pattern.
Key Concepts
Area of a triangle = 1/2
Area of a triangle = 1/2 × Base × Height. So, the ratio of areas of two triangles is equal to the ratio of the products of their bases and correspondi
If a line parallel to one
If a line parallel to one side of a triangle intersects the other two sides at two distinct points, it divides those sides in the same proportion. For
If a line divides any two
If a line divides any two sides of a triangle in the same ratio, then it is parallel to the third side. This converse can be proved by the indirect me
The bisector of an angle
The bisector of an angle of a triangle divides the opposite side in the ratio of the remaining sides. For triangle ABC, if the bisector of angle C mee
If D is a point on
If D is a point on BC such that AB/AC = BD/DC, then AD bisects angle BAC.
Learning Objectives
- Identify when two triangles are similar using AA, SAS, and SSS tests.
- Use the ratio of areas of two triangles and special cases with equal heights or equal bases.
- Apply the Basic Proportionality Theorem and its converse.
- Use the angle bisector theorem and its converse in triangle problems.
- Find proportional intercepts made by three parallel lines on two transversals.
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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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