Olympiad Test: Understanding Elementary Shapes - Class 6 MCQ

1m = 100 cm 3m = 3×100 cm = 300cm

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.

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.

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 angle between perpendicular lines is 90°.

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

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