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00:03:26
Measuring angles using a protractor | Angles and intersecting lines | Geometry | Khan Academy
11 意见 . 04/01/24
Teacherflix
00:08:22
Measuring angles in degrees | Angles and intersecting lines | Geometry | Khan Academy
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00:04:51
Proof: Vertical angles are equal | Angles and intersecting lines | Geometry | Khan Academy
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00:04:51
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5 意见 . 04/01/24
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00:08:31
Complementary and supplementary angles | Angles and intersecting lines | Geometry | Khan Academy
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