Question

what is the value of x?
triangle rst with r at top, t at bottom left, s at bottom right. side rt has one tick mark, side rs has one tick mark, side ts has one tick mark. angle at r is x degrees.
x = \boxed{}^\circ

Explanation:

Step1: Identify triangle type

The triangle has all 3 sides marked equal, so it is an equilateral triangle.

Step2: Recall equilateral triangle angle property

All interior angles of an equilateral triangle are equal, and the sum of interior angles of a triangle is $180^\circ$.

Step3: Calculate angle $x$

$x = \frac{180^\circ}{3}$

Answer:

$60$