Triangles
CBSE 2026 Board Exam Set 1 (Code 30/7/1)
CBSE_BOARD_PYQ_2026_30_7_1
Grade 10
Question:
[Section A]
In $\triangle ABC$ and $\triangle DEF$, $\dfrac{AB}{DE} = \dfrac{BC}{FD}$. They will be similar when:
(A) $\angle B = \angle E$
(B) $\angle A = \angle D$
(C) $\angle B = \angle D$
(D) $\angle A = \angle F$
Step-by-Step Solution
Key Concept: SAS similarity criterion requires the included angle between proportional sides to be equal.
Sol. (C) $\angle B = \angle D$. [1.0 Mark]
Correct Answer: (C) $\angle B = \angle D$
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