Polygons Quiz - CBSE Class 9 Mathematics

Free practice quiz: Polygons (CBSE Class 9 Mathematics). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. What is a polygon?

   1. A shape with no sides
   2. A shape with straight sides
   3. A shape with rounded edges
   4. A three-dimensional shape
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   Answer: B. A shape with straight sides

   A polygon is defined as a flat shape with straight sides that are fully closed.

2. What is the sum of the interior angles of a triangle?

   1. 90 degrees
   2. 180 degrees
   3. 270 degrees
   4. 360 degrees
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   Answer: B. 180 degrees

   The sum of the interior angles of a triangle always equals 180 degrees.

3. What type of polygon is a hexagon?

   1. 2-sided
   2. 3-sided
   3. 5-sided
   4. 6-sided
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   Answer: D. 6-sided

   A hexagon is a polygon that has six sides.

4. What is the main characteristic of a convex polygon?

   1. All interior angles are greater than 180 degrees
   2. All vertices point outward
   3. It has concave angles
   4. It has at least one interior angle greater than 90 degrees
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   Answer: B. All vertices point outward

   A convex polygon is characterized by having all its vertices pointing outward, meaning all interior angles are less than 180 degrees.

5. What is the sum of the interior angles of a pentagon?

   1. 360 degrees
   2. 540 degrees
   3. 720 degrees
   4. 900 degrees
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   Answer: B. 540 degrees

   The sum of the interior angles of a pentagon can be calculated using the formula (n-2) × 180, which for 5 sides equals 540 degrees.

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