Chapter Exam

Chapter 10: Geometry — Online MCQ Test

Q: A triangle is a polygon with how many sides?

Answer: B. 3 sides — A triangle by definition is a closed polygon with exactly 3 sides and 3 angles.

Q: A triangle with all three sides equal is called a _____ triangle.

Answer: C. Equilateral — An equilateral triangle has all three sides of equal length.

Q: Which of the following is NOT a type of triangle based on sides?

Answer: D. Convex — Convex is a classification based on angles or shape properties, not based on the sides of a triangle.

Q: Which of the following triangles cannot exist?

Answer: D. A triangle with angles 30°, 50°, 110° — The sum of angles 30° + 50° + 110° = 190°, which exceeds 180°, so such a triangle cannot exist.

Q: In an isosceles triangle ABC with AB = AC, the median from A to BC has a special property. What is it?

Answer: B. It is also the altitude and angle bisector — In an isosceles triangle, the median from the apex is also the altitude and angle bisector of that angle.

MATHS · Samacheer Kalvi 6th · Tamil Nadu State Board

Practice Chapter 10: Geometry with a free chapter-wise online MCQ test for Tamil Nadu State Board Samacheer Kalvi 6th MATHS. This chapter covers: Triangles, Types of triangles, Median, Altitude, Quadrilateral basics. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 10: Geometry — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board Samacheer Kalvi 6th MATHS — Chapter 10: Geometry, with answers and explanations. These are sample questions; the exam has its own separate question set.

A triangle is a polygon with how many sides?

A. 2 sides
B. 3 sides ✓
C. 4 sides
D. 5 sides

Answer: B. 3 sides
A triangle by definition is a closed polygon with exactly 3 sides and 3 angles.

A triangle with all three sides equal is called a _____ triangle.

A. Isosceles
B. Scalene
C. Equilateral ✓
D. Right-angled

Answer: C. Equilateral
An equilateral triangle has all three sides of equal length.

Which of the following is NOT a type of triangle based on sides?

A. Equilateral
B. Isosceles
C. Scalene
D. Convex ✓

Answer: D. Convex
Convex is a classification based on angles or shape properties, not based on the sides of a triangle.

Which of the following triangles cannot exist?

A. A triangle with angles 60°, 60°, 60°
B. A triangle with angles 45°, 45°, 90°
C. A triangle with angles 50°, 60°, 70°
D. A triangle with angles 30°, 50°, 110° ✓

Answer: D. A triangle with angles 30°, 50°, 110°
The sum of angles 30° + 50° + 110° = 190°, which exceeds 180°, so such a triangle cannot exist.

In an isosceles triangle ABC with AB = AC, the median from A to BC has a special property. What is it?

A. It is parallel to BC
B. It is also the altitude and angle bisector ✓
C. It divides the triangle into two unequal parts
D. It is longer than the sides

Answer: B. It is also the altitude and angle bisector
In an isosceles triangle, the median from the apex is also the altitude and angle bisector of that angle.

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