การวัดขนาดของมุม โดยใช้โพรแทรกเตอร์
[b](Updated: 18 Mar 2012)[/b]
Demonstrate how to use the protractor to measure an angle.
(繁體中文版：http://www.geogebratube.org/material/show/id/2456 )
- Resource Type
-
Activity
- Tags
-
- Target Group (Age)
- 11 – 14
- Language
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