Step-by-step explanation:

Step-by-step explanation:
Since there is 2 unknown variable ,
so we need 2 equation to find their values.
Answer:
Step-by-step excircle
A circle is a plane figure bounded by one curved line, and such that all straight lines drawn from a certain point within it to the bounding line, are equal. The bounding line is called its circumference and the point, its centre.planation: