5 ÷ 1/2 => 5 x 2/1 => 10/1 => 10
To find square numbers, you multiply the number by itself.
For example:
5 x 5 = 25
10 x 10 = 100
I have mercy:
8x and 9x+5 (the angles) form a right angle so 8x+9x+5=90 which means x is 5 and plugging it back into the angles 8x we get 40 sinceBHR and angle 8x are vertical angles they are equal to each other and so it's equal to 40
