Answer:
60 degrees
Step-by-step explanation:
This triangle has 3 sides that are all 61 units. Therefore, this triangle must be equilateral, because all of the sides are equal.
In an equilateral triangle, all the angles are equal and add to 180 degrees.
Therefore, we can say that, if x represents an angle,
3x=180
Now, solve for x, by isolating x. 3 and x are being multiplied, so divide both sides by 3 (division is the opposite of multiplication)
3x/3=180/3
x=180/3
x=60
The measure of angle A is 60 degrees
