Olympiad Test: Understanding Elementary Shapes - Class 6 MCQ

1 meter (m) is equal to 100 centimeters (cm).

So, for 3 meters: 3 × 100 = 300

Thus, 3 meters is equal to 300 centimeters.

100cm = 1m

1cm = (1/100)m

805cm in m = (805/100)m

Formula used: Divide the length value by 100
Correct option is D. 8.05 m

(4.5 - 2.5) + (4.5 - 3.0) + (7.5 - 3.5)
= 2 + 1.5 + 4
= 7.5 cm = 8 cm (approx.)

By observing & comparing the given figures, rectangle B is the longest rectangle.

An angle which measures more than 0° and less than 90° is called an acute angle.

• Acute Angle: Measures between 0° and 90°.
• Obtuse Angle: Measures between 90° and 180°.
• Right Angle: Measures exactly 90°.
• Straight Angle:  Measures exactly 180°.

Therefore, the correct answer is B: Acute angle.

The measure of an angle is expressed in degrees. A protractor is used to measure the angle, and the unit for measuring angles is degrees (°).

Length of line A = 9 cm

Length of line B = 7−2 = 5 cm

Length of line A − length of line B = 9 − 5 = 4 cm

Hence, line A is 4 cm longer than line B.

An angle that measures 0° is called a zero angle because there is no separation between the two rays that form the angle.

The angle ∠AOB shown in the image is an obtuse angle because it is greater than 90° but less than 180°.

Correct answer: a) An obtuse angle

• The minute hand at 20 minutes points at the 4 on the clock.
• The hour hand at 5:20 is slightly past the 5. Each hour mark represents 30 degrees (360 degrees/12 hours)
• Angle between 5 and 4 is 30 degrees per hour mark, hence 30 + 10 = 40 degrees.
• A 40-degree angle is acute, making the correct answer C: An acute angle.

The angle between perpendicular lines is 90°.

179^∘ 90^∘, 179^∘ 180^∘  So it is obtuse.

An angle that measures less than 90° is called an acute angle. Since 89° is less than 90°, it is an acute angle.

When an arm of an angle is extended, the measure of the angle remains the same. The angle itself does not change; only the position of one of its arms is altered. The extension does not affect the measurement of the angle.

Reflex angles are those that "bend back" on themselves, creating an angle larger than a straight line (180°) but not completing a full circle (360°). Therefore, 270° fits the definition of a reflex angle.

So, the correct answer is 270°.

⇒ In ∠PRQ, Q is a vertex of an angle.

⇒ RP and RQ are two rays of an angle.

⇒ So, RP and RQ​ are two arms of ∠PRQ.

Just add the Symbol of ⊥ between the vectors

The lines that lie on the same plane and do not intersect at any point are called parallel lines. Parallel lines maintain the same distance apart and never meet, no matter how far they are extended.

The opposite sides of the rectangle are parallel to each other. There are two such pairs of sides:

• The two horizontal sides are parallel to each other.
• The two vertical sides are parallel to each other.

Thus, there are 2 pairs of parallel lines in a rectangle.

The correct answer is: a) 2.