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When it is 10 : 30, what kind of angle is formed by the hands of the clock?
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.
At what time given below do the minute and hour hands of a dock make a right angle?
(A)
(B)
(C)
(D)
How many angles in the given figure are less than a right angle?
5 angles are less than a right angle.
An angle which measures more than 0° but less than 90° is called ____.
an angle which measures more than 0 degree and less than 90 degree is called an acute angle..
Which of the following is NOT drawn in the diagram?
Except line segment CD, ray BD, line AD and ∠B is clearly seen in the diagram.
Hence the correct answer is option D.
Danish drew an angle as shown here. Manish drew an angle that was twice the measure of Danish's angle. What was the measure of Manish's angle?
Measure of angle drawn by Danish = 40^{∘}
∴Measure of angle drawn by Manish = 2×40^{∘}=80^{∘}
How many of the given figures have perpendicular lines?
4
All the figures as shown in above have perpendicular lines
Hence the correct answer is option D.
How many angles are less than 90^{∘} in the given figures?
There are 3 acute angles in the given figures.
In the given figure, which line is perpendicular to AB?
According to the given figure line EF and line AB meet each other at right angle
∴ Line EF is perpendicular to line AB
Hence the correct answer is option B
What is the approximate measure of this angle in degrees?
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.
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