Answer:
Step-by-step explanation:
Cristina is describing an equilateral triangle. An equilateral triangle has three equal sides and three equal angles, each measuring 60 degrees. Here's a simple representation of Cristina's shape:
```
/\
/ \
/____\
```
In this equilateral triangle, all three sides are 4 centimeters in length, and all three angles are 60 degrees.