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CTET Paper I (Classes I to V) 10 Jan 2023 Solved Paper

Question : 37 of 150

Marks: +1, -0

Which of the following statements is true ?

Solution:

Concept:

A right angle is equal to

90^\circ

. Check each option by multiplying the number of right angles by

90^\circ

Explanation:

Option A:

3

right angles

= 3 \times 90 = 270^\circ \neq 300^\circ

. False.

Option B:

3\frac{1}{2}

right angles

= \frac{7}{2} \times 90 = 315^\circ

, which exactly matches

315^\circ

. True.

Option C:

2

right angles

= 2 \times 90 = 180^\circ \neq 190^\circ

. False.

Option D:

2\frac{1}{2}

right angles

= \frac{5}{2} \times 90 = 225^\circ \neq 215^\circ

. False.

Thus, only option B is correct.

Answer:

Option B:

3\frac{1}{2}

right angles

= 315^\circ

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