Angles And Parallel Lines Worksheet With Answers Page 6
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B. Estimating Angles using Referent Angles
The estimation of angles using common angles
and the human eye can be useful in many jobs.
__________________________, such as 45º
and 90º can be used to visualize and determine
the approximate size of a given angle. Angles
measure from _______ to _______.
Common referent angles include:
When looking at the referents, these are the things to keep in mind. A right angle of 90°
has the rays perpendicular to each other. A 45° angle is about half of a _____________
angle. The 30° angle and the 60° angle are each __________________ than and
________________ than the 45°. These referents can be combined with each other, or
with a straight angle to estimate larger angles.
Example 3: Use the referent angles above to estimate the size of these angles. After
estimating their size, use a protractor to accurately measure each angle.
Worksheet: Estimating Angles using Referent Angles
Math 10 Workplace
Marsh
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