# Lesson 5.1: Angles

## Symbols

$\angle \phantom{\rule{.3em}{0ex}}\text{angle}$

⠸⠪

$\measuredangle \phantom{\rule{.3em}{0ex}}\text{measured angle}$

⠨⠸⠪

$\u299c\phantom{\rule{.3em}{0ex}}\text{measured right angle}$

⠼⠸⠪

## Explanation

The angle symbol is not considered a shape. The angle sign is formed with a dots four five six prefix in the first cell and dots two four six in the second cell. The symbol for measured angle is formed with three cells; dots four six in the first cell, dots four five six in the second cell, and dots two four six in the third cell. The symbol for measured right angle is also formed with three cells. The numeric prefix, dots three four five six, is in the first cell, the second cell is dots four five six, and the third cell is dots two four six. Follow print for use of the angle symbol.

### Example 1

$\angle \mathrm{ABC}$

⠸⠪⠀⠠⠠⠁⠃⠉

### Example 2

$\angle 1=75\xb0$

⠸⠪⠀⠼⠁⠀⠐⠶⠀⠼⠛⠑⠘⠚

### Example 3

$\angle A<\angle B$

⠸⠪⠠⠁⠀⠈⠣⠀⠸⠪⠠⠃

### Example 4

$\u299c\phantom{\rule{.3em}{0ex}}\text{is}\phantom{\rule{.3em}{0ex}}90\xb0$

⠼⠸⠪⠀⠊⠎⠀⠼⠊⠚⠘⠚

### Example 5

$\measuredangle \mathrm{ABC}=30\xb0$

⠨⠸⠪⠠⠠⠁⠃⠉⠀⠐⠶⠀⠼⠉⠚⠘⠚