Olympiad Test : Geometry - 1 - Class 6 MCQ

A right angle measures 90°. Therefore, four right angles would be:
4 × 90° = 360° 
Thus, the correct answer is Option C: 360°.

Required degrees 

A ray is a part of a line that has a fixed starting point (the initial point) but extends infinitely in one direction. For any given point as the initial point, an unlimited number of rays can be drawn, as they can be directed in any direction from that point.

Thus, the correct answer is Option D: An unlimited number.

The maximum number of points of intersection of three lines in a plane is 3. This occurs when no two lines are parallel, and no three lines are concurrent (meaning they don't all meet at the same point).

Each pair of lines can intersect at a single point, so with three lines, there can be up to 3 points of intersection.

Thus, the correct answer is Option D: 3.

• A ray has one endpoint and extends infinitely in one direction.
• A line has no endpoints and extends infinitely in both directions.
• A line segment has two endpoints and is a finite part of a line.
• An angle is formed by two rays, but it doesn't have endpoints; it has a vertex.

Thus, the correct answer is Option B: A line.

Through any two distinct points, only one line can be drawn. This is because there is exactly one straight line that passes through two distinct points.

Thus, the correct answer is Option A: One.

A square has four lines of symmetry. These lines of symmetry include:

• Two diagonal lines (from corner to corner).
• Two lines through the midpoints of opposite sides (vertical and horizontal).

Thus, the correct answer is Option D: Four lines of symmetry.

A circle has an unlimited number of lines of symmetry. Every diameter of the circle is a line of symmetry, and there are infinitely many diameters.

Thus, the correct answer is Option C: An unlimited number of lines of symmetry.

• A square has four lines of symmetry: two diagonals and two lines through the midpoints of opposite sides.
• A parallelogram has two lines of symmetry (only if it is a rectangle or rhombus). So, statement B is incorrect.
• A rhombus has two lines of symmetry (the diagonals), not four. So, statement C is incorrect.
• A rectangle has two lines of symmetry (vertical and horizontal), not four. So, statement D is incorrect.

Thus, the correct answer is Option A: A square has four lines of symmetry.

A cuboid is a three-dimensional figure, it has length, breadth, and height.

Therefore, a cuboid has length, breadth and height.
Hence option (D) is correct.