"one less than
half a number is
a maximum of 19"

1/2x-1 < 19
But for the less than sign there should be a line underneath it for less than or equal to. My keyboard dosent have that symbol
Explanation: less than is subtraction
Half a number means you multiply a number by 1/2 so that’s why I used the variable x
And no more than 19 means that the solution can be less than or the same as 19 so that’s why you would use < with a line underneath it

Def is a scalene triangle

Um what? rephrase that ?