Basic Geometrical Ideas

Short Answer Questions(SAQs)

What are intersecting lines?

If two distinct lines meet or cross at a point, they are called intersecting lines.

What is a simple curve?

A curve which starts and ends at the same point without crossing itself is called a simple closed curve.

What are parallel lines?

Parallel lines can be defined as two lines in the same plane that are at equal distances from each other and never meet.

MCQs

1. Which of the following is a closed figure?

(a) A semicircle

(b) A line segment

(c) A triangle

(d) A ray

► (c) A triangle is a closed figure with three sides.

2. A line has:

(a) One endpoint

(b) Two endpoints

(c) No endpoints

(d) Three endpoints

► (c) A line extends endlessly in both directions, so it has no endpoints.

3. What is a point?

(a) A tiny square

(b) A thick mark

(c) An exact location

(d) A curve

► (c) A point represents an exact location or position.

4. How many endpoints does a ray have?

(a) One

(b) Two

(c) None

(d) Infinite

► (a) A ray has one endpoint and extends infinitely in one direction.

5. Which figure has all sides equal and all angles equal?

(a) Rectangle

(b) Square

(c) Triangle

(d) Trapezium

► (b) A square has all sides and angles equal.

6. What do we call lines that do not meet and are always the same distance apart?

(a) Intersecting lines

(b) Skew lines

(c) Parallel lines

(d) Perpendicular lines

► (c) Parallel lines are lines that never meet and are equidistant.

7. Which shape is formed by three line segments?

(a) Rectangle

(b) Triangle

(c) Square

(d) Pentagon

► (b) A triangle has three line segments.

8. A polygon with 6 sides is called:

(a) Pentagon

(b) Octagon

(c) Hexagon

(d) Heptagon

► (c) A polygon with 6 sides is called a hexagon.

9. What do we call a line that cuts another line at 90 degrees?

(a) Parallel line

(b) Intersecting line

(c) Perpendicular line

(d) Ray

► (c) A perpendicular line intersects another at a 90° angle.

10. A circle is defined by its:

(a) Center

(b) Length

(c) Area

(d) Diameter

► (a) A circle is defined by its center and radius.

11. The longest chord of a circle is:

(a) Radius

(b) Arc

(c) Diameter

(d) Sector

► (c) The diameter is the longest chord of a circle.

12. An angle less than 90° is:

(a) Right angle

(b) Acute angle

(c) Obtuse angle

(d) Reflex angle

► (b) An acute angle is less than 90°.

13. Which of the following is not a polygon?

(a) Triangle

(b) Square

(c) Circle

(d) Pentagon

► (c) A circle is not a polygon because it has no straight sides.

14. A chord divides the circle into two:

(a) Arcs

(b) Radii

(c) Tangents

(d) Centers

► (a) A chord divides the circle into two arcs.

15. Which part of a circle touches only one point on its boundary?

(a) Radius

(b) Tangent

(c) Chord

(d) Sector

► (b) A tangent touches a circle at exactly one point.

16. The line segment from center to any point on circle is called:

(a) Diameter

(b) Chord

(c) Radius

(d) Arc

► (c) A radius connects the center to any point on the circle.

17. Which shape has no corners?

(a) Square

(b) Triangle

(c) Rectangle

(d) Circle

► (d) A circle has no corners or sides.

18. A polygon with 5 sides is called:

(a) Hexagon

(b) Octagon

(c) Pentagon

(d) Nonagon

► (c) A polygon with 5 sides is called a pentagon.