Test: Lines, Angles & Triangles - 2 - Class 5 MCQ

Here the angle between any two consecutive numbers in a clock is 30^∘.
Now we know that when time is 30 minutes, then the minute clock will be at 6.
And when time is 10:30, the hour clock will be between 10 and 11. Let us draw a clock here for better understanding.

Now the number of parts (number) between 6 to 10 are 4. So an angle between 6 and 10 will be 4×30^∘=120^∘4×30^∘=120^∘. Similarly, there are 5 parts between 6 to 11. So the angle between 6 and 11 will be 5×30^∘=150^∘5×30^∘=150^∘.
Hence our angle will be between 120^∘ and 150^∘120^∘ and 150∘ and it will be exactly in middle of 10 and 11, so angle will be equal to 120^∘+150^∘2=270^∘2=135^∘120^∘+150^∘2=270^∘2=135^∘.
Hence our required angle between the hands of a clock as 10:30 is 135^∘.
Since 135^∘ is greater than 90^∘ so it is an obtuse angle.

(A)
(B)
(C) 
(D)

1. A star has both acute angles (less than 90°) and obtuse angles (greater than 90° but less than 180°).
2. In a standard 5-pointed star, the tips of the star have acute angles (less than 90°).

Since the star in the image is a 5-pointed star, all 5 tip angles are acute.

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

Except line segment CD, ray BD, line AD and ∠B is clearly seen in the diagram.

Hence the correct answer is option D.

Measure of angle drawn by Danish = 40^∘
∴Measure of angle drawn by Manish = 40^∘

First figure: Yes, it contains perpendicular lines (right angles at the ends).

Second figure: Yes, the "cross" pattern clearly contains perpendicular lines.

Third figure: No, the curved or pointed shape does not contain any perpendicular lines.

Fourth figure: No, the arrow shape does not have any perpendicular lines.

There are 0 acute angles in the given figures. As all the angles are 90⁰.

According to the given figure line IJ and line AB meet each other at right angle

∴ Line IJ is perpendicular to line AB
Hence the correct answer is option B

The given angle is a acute angle, so option D and option C is not correct

The approximate value of above angle is 45o, as the angle of 20o would be very small than the given angle

Hence the correct answer is option B.