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Question
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 ______.
Options
acute angle
obtuse angle
right angle
straight angle
Solution
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 obtuse angle.
Explanation:
If an angle is larger than a right angle but less than a straight angle, it is called an obtuse angle. These are obtuse angles.
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How can you make your own angle tester?
Measure the angle given below using the Protractor and write down the measure.
Measure the angle given below using the Protractor and write down the measure.
From these two angles which has larger measure? Estimate and then confirm by measuring them.
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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 ______.
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 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 :
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| 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 |
|
|
