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Acute right and obtuse angles

Khan Academy
507
05:31

Measuring angles

Khan Academy
493
04:04

Using a protractor

Khan Academy
494
03:25

Measuring angles in degrees

Khan Academy
495
08:21

Angle basics

Khan Academy
497
06:48

Identifying rays

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502
05:39

The golden ratio

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461
14:41

Language and notation of the circle

Khan Academy
509
11:11

Specifying planes in three dimensions

Khan Academy
451
04:11

Drawing lines exercise example

Khan Academy
511
01:54

Lines, line segments, and rays

Khan Academy
448
03:37

Euclid as the father of geometry

Khan Academy
550
08:22

Identity property of 0

Khan Academy
446
04:45

Inverse property of addition

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465
02:59

Properties of numbers 2

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449
01:51

Inverse property of multiplication

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424
03:16

Telling time exercise example 1

Khan Academy
507
02:50

Telling time exercise example 2

Khan Academy
461
02:15

Measuring the same rectangle with different unit squares

Khan Academy
480
03:43

Introduction to area and unit squares

Khan Academy
515
04:16