True
∠2 and ∠5 are both vertical at the vertex of the 2 straight lines
Step-by-step explanation:

It’s not exactly equal to one, but in many cases in math they ask for a rounded answer.
Answer:

Step-by-step explanation:
we know that
An <u><em>equilateral triangle</em></u> has three equal sides and three equal interior angles (each interior angle measure 60 degrees)
so
The perimeter is equal to

where
b is the length side of the equilateral triangle
we have

substitute

solve for b

Find the area
The formula of area applying the law of sines is equal to

substitute the value of b



