Answer:
D. Inscribed angle
Explanation:
An inscribed angle has a vertex on the circumference. For any arc, every inscribed angle is exactly half of the central angle. In other words, if the central angle is
and the inscribed angles is
, then it is true that:
![y^(\circ)=(x^(\circ))/(2)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/5yoo0d701nzfey0923c6krw1qjyvb0oyzw.png)
In this problem
, then the central angle is
![x^(\circ)=2y^(\circ) \ \therefore x^(\circ)=2(36^(\circ)) \therefore x^(\circ)=72^(\circ)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/wzo3cswf5fge9mofuichss0en6vhlxs5o6.png)