Yes it is true for example like a parrelogram that has 2 obtuse angels so which means it is true
Answer:

Step-by-step explanation:
The area of an equilateral triangle with side length
is equal to
. Since the perimeter is 24 units and there are three equal sides to an equilateral triangle, each side is
units.
Substituting in this value, we get:

Answer:
73.4846922835 = 73.5 and no it is not a perfect square 5400/100 = 54
Here you go!! these are all the ones i know, sorry but i hope you get a A+