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Question
Find the measure of the angle shown in figure. (First estimate with your eyes and then find the actual measure with a protractor).
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Solution
On observing with eyes - 125°
On measuring with protractor - 130°
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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?
Which part of the protractor must be placed exactly on the vertex of the angle?
In the units table, what is the conversion for 1′ (one minute)?
An angle opens towards the right. After placing the vertex correctly, you align the bottom arm with the baseline. Which scale will you most likely use?
