Skip to content

If in △ABC and… (Class 10 Maths Basic SQP 2025-26, Q9)

questionbuddy.in/q/cbse-10-maths-2025-26-sqp-basic-q9-abc-def-they-similar

MathsCBSE Class 10 · Basic · Sample paper, session 2025-26 · 1 mark · MCQ

CBSE Class 10 Mathematics Basic sample paper 2025-26: question 9

From the official CBSE sample question paper for 2025-26, section A, question 9, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q9 · 1 mark · MCQTriangles

If in ABC and DEF, then they will be similar when

  1. (A)
  2. (B)
  3. (C)
  4. (D)

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2025-26.

Hints

Open one hint at a time and try again before the next.

Hint 1

Think of the SAS similarity criterion.

Hint 2

Find the vertex shared by sides EF and DE.

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. By the SAS similarity criterion, the included angles must be equal.

  2. The angle included between AB and AC is . The angle included between EF and DE is .

  3. So we need , option (B).

    1 mark

Answer: , option (B)

Where the marks are

  • Identifies the included angles for SAS similarity (1 mark)

Revise the chapter

  • Chapter: Triangles (notes, formulas, where marks are lost and every past question)
Practise this chapterBoard-style questions from Triangles, one at a time, marked against the answer key and marking points.Back to the full paperSample paper 2025-26 (Basic): every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.