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Triangles
CBSE 2026 Board Exam Set 1 (Code 30/1/1)
CBSE_BOARD_PYQ_2026_30_1_1
Grade 10

Question:

[Section D]

State and prove Basic Proportionality Theorem (Thales' Theorem).
Question Figure

Step-by-Step Solution

Key Concept: Line parallel to one side of triangle divides other two sides in same ratio.
Statement, Given, To Prove, Construction and complete area ratio proof. [5.0 Marks]

Correct Answer: Formal proof of BPT.
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