Answer:

In this special case we know that
and
and for this case we can add all the values 12+18 +12+18=60 and that represent the perimeter
Step-by-step explanation:
For this case we know that the perimeter is given by:

In this special case we know that
and
and for this case we can add all the values 12+18 +12+18=60 and that represent the perimeter
So u can give dat person brainlist
Since the three angles of a triangle add to give 180°
The the size of the largest angle 4 = 180° ×

= 180° ×
∴ the size of the largest angle = 80°
There are no solutions to the given system of equations.
Hope this helps.