Answer:
<h2>C. isosceles</h2><h2 />
Step-by-step explanation:
An isosceles triangle is a triangle with (at least) two equal sides.
In the figure given, the two equal sides have length of 12, and the remaining side has length 11. .
This property is equivalent to two angles of the triangle being equal.
An isosceles triangle therefore has both two equal sides and two equal angles.
