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Acute right and obtuse angles

Khan Academy
553
05:31

Measuring angles

Khan Academy
547
04:04

Using a protractor

Khan Academy
541
03:25

Measuring angles in degrees

Khan Academy
547
08:21

Angle basics

Khan Academy
552
06:48

Identifying rays

Khan Academy
548
05:39

The golden ratio

Khan Academy
509
14:41

Language and notation of the circle

Khan Academy
562
11:11

Specifying planes in three dimensions

Khan Academy
503
04:11

Drawing lines exercise example

Khan Academy
559
01:54

Lines, line segments, and rays

Khan Academy
501
03:37

Euclid as the father of geometry

Khan Academy
598
08:22

Identity property of 0

Khan Academy
500
04:45

Inverse property of addition

Khan Academy
519
02:59

Properties of numbers 2

Khan Academy
490
01:51

Inverse property of multiplication

Khan Academy
472
03:16

Telling time exercise example 1

Khan Academy
548
02:50

Telling time exercise example 2

Khan Academy
512
02:15

Measuring the same rectangle with different unit squares

Khan Academy
574
03:43

Introduction to area and unit squares

Khan Academy
574
04:16