M9_L14 មុំផ្ចិត មុំចារឹកក្នុងរង្វង់ មុំស្កាត់ធ្នូរួម

PROPERTY OF THE INSCRIBED ANGLE
Reflection 1
Move the points A, B or C and compare the angles. What do you notice?
Proof
Guidelines for understanding of proof
Change the "steps" selector and note the justification steps. Do you understand?[br]If you have not understood the property of the external angle [url=https://www.geogebra.org/m/eFMvcngj]click here[/url] and check.[br]Return the selector to step 0. Move point C down. Observe the justification steps. Do you understand?[br]Return the selector to step 0. Move point C upwards. Observe the justification steps. Do you understand?
Measure of circular segment angle
Reflection
Change the position of point C and compare the angles of the circular segment and the center angle. What do you notice?
Arc capable and inscribed angle
Reflection 3
What is the angle of the AEB? and the angle ADB? Why?
Note
The activity was elaborated in Portuguese (Brazil) and translated into English. It is important to improve! [url=mailto:jcassio@gmail.com]jcassio@gmail.com[/url]
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Information: M9_L14 មុំផ្ចិត មុំចារឹកក្នុងរង្វង់ មុំស្កាត់ធ្នូរួម