In order to estimate a given angle, keep in mind a 90° angle (right angle).
A 90° angle looks like a corner of a rectangular piece of paper or a corner of a square.
Let's look at an example.
Consider the angle given below.
Let's estimate the measure of this angle.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21 is the smallest number.