241121 geometry in school mathematics

Sep 29, 20130 likes326 views

DeKAssumPZ

สื่อการเรียนรู้มัลติมีเดียนี้เป็นส่วนหนึ่ง
ของวิชานวัตกรรมและเทคโนโลยีสารสนเทศเพื่อการเรียนรู้
241203 Section 2
ระดับปริญญาตรีชั้นปีที่ 2

B D C E
B C
B D C E
D E
ข้อตกลง
ให้ A แทนขนาดของมุม A
ให้ B แทนขนาดของมุม B
ให้ C แทนขนาดของมุม C
ให้ D แทนขนาดของมุม D
ให้ E แทนขนาดของมุม E

หลังจากที่เราสามารถพิสูจน์ได้ว่าผลรวมของ
มุมภายในของรูปสามเหลี่ยมใดๆเท่ากับ 180
องศาแล้ว เราได้อะไรจากภาพนี้บ้าง ?

The word ‘Geometry’ comes from Greek words ‘geo’ meaning the ‘earth’ and ‘metrein’ meaning to ‘measure’. Geometry appears to have originated from the need for measuring land. Nearly 5000 years ago geometry originated in Egypt as an art of earth measurement. Egyptian geometry was the statements of results. The knowledge of geometry passed from Egyptians to the Greeks and many Greek mathematicians worked on geometry. The Greeks developed geometry in a systematic manner..

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