Angles: acute or obtuse
for 3rd grade
Identify whether the given angles are acute angles, right angles or obtuse angles
Identify angles: acute, obtuse or right angle
This topic requires you to identify the type of angle illustrated in each question. The three types of angle you will identify are acute, obtuse and right angles.
An acute angle is an angle that measures less than 90°.
For example, ∠30°, ∠40°, ∠57° are all acute angles.
An obtuse angle is an angle that measures more than 90° and less than 180°. Obtuse is another word for stupid, but these angles are not stupid...
Examples of obtuse angles include ∠130°, ∠108° and ∠179°.
A right angle is an angle that measures exactly 90°. It has a special square symbol when shown diagramatically as opposed to the curved arc of other angles.
Note: You may also sometimes come across a 'straight angle' in text books - that is an angle of exactly 180°.
Below is a table showing the first 6 question answer pairs for the topic "Angles: acute or obtuse" as used in the lessons for this topic. Our games and tests for the topic use these 6 items plus 10 additional question answer pairs.
The topic "Angles: acute or obtuse" is in the category Shapes for 3rd grade (ages 8 to 9).
Revise 'Angles: acute or obtuse' with one of our games for 3rd grade
Each of our math topics for elementary are made up of between 6 and 20 question and answer pairs (both the written form and a robot voice speaking those questions and answers). Each topic can be used with all the activities on the site.
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