Question 834148
This is an isosceles triangle since the two radii (that are part of this triangle) are congruent legs.


So the base angles are both congruent to x. We have the 3 angles: 60, x, x


They must add to 180, so...


60 + x + x = 180


60 + 2x = 180


2x = 180 - 60


2x = 120


x = 120/2


x = 60


This means that all three angles of this triangle are 60 degrees. So we actually have an equilateral triangle with all sides equal to <font color="red">6 cm</font>, which is the final answer.