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Question
Fill in the blanks with acute, obtuse, right or straight:
An angle whose measure is the sum of the measures of two right angles is ______.
Options
acute angle
obtuse angle
right angle
straight angle
Solution
An angle whose measure is the sum of the measures of two right angles is straight angle.
Explanation:
The turn from north to east is by a right angle. The turn from north to south is by two right angles; it is called a straight angle.
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Fill in the blanks with acute, obtuse, right or straight:
An angle whose measure is less than that of a right angle is ______.
Fill in the blanks with acute, obtuse, right or straight:
An angle whose measure is greater than that of a right angle is ______.
Fill in the blanks with acute, obtuse, right or straight:
When the sum of the measures of two angles is that of a straight angle, and if one of them is acute then the other should be ______.
Find the measure of the angle shown in figure. (First estimate with your eyes and then find the actual measure with a protractor).
Find the angle measure between the hands of the clock in figure :
 |
| 9.00 a.m. |
Find the angle measure between the hands of the clock in figure :
 |
| 6.00 p.m. |
Investigate
In the given figure, the angle measures 30°. Look at the same figure through a magnifying glass.
- Does the angle become larger?
- Does the size of the angle change?
Measure and classify each angle :
|
Angle |
Measure |
Type |
|
∠AOB |
|
|
|
∠AOC |
|
|
|
∠BOC |
|
|
|
∠DOC |
|
|
|
∠DOA |
|
|
|
∠DOB |
|
|
