Video: Identifying Angles by Comparing Them Visually to a Right Angle

Look at the given shape. How many acute angles are there in the shape? How many obtuse angles are there in the shape? How many right angles are there in the shape?

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Video Transcript

Look at the given shape. How many acute angles are there in the shape? How many obtuse angles are there in the shape? How many right angles are there in the shape?

In this question, we have to count the number of acute angles in the given shape, the number of obtuse angles, and the number of right angles. We can answer the third part of the question really quickly. This blue square is the symbol we use to show a right angle, so we know the shape has one right angle. How many acute angles are there? We know acute angles measure less than 90 degrees or less than a right angle. This is an acute angle, and this is an acute angle. Both of these angles measure less than a right angle. This angle is greater than a right angle. We call this type of angle an obtuse angle. So, there are two acute angles, one obtuse angle, and one right angle in the given shape.

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