Answer:
6x - 8
Step-by-step explanation:
![P = 2(x + 5) + 2(2x - 9)\\P = 2x + 10 + 4x - 18\\P = 6x - 8](https://tex.z-dn.net/?f=P%20%3D%202%28x%20%2B%205%29%20%2B%202%282x%20-%209%29%5C%5CP%20%3D%202x%20%2B%2010%20%2B%204x%20-%2018%5C%5CP%20%3D%206x%20-%208)
The answer is to this equation is
U=15
Answer:
An acute triangle can be equilateral
An equilateral triangle is always equiangular.
A right triangle can be scalene.
An acute triangle can be isosceles
Step-by-step explanation:
Answer:
13 sides
Step-by-step explanation:
Sum of interior angles = (n - 2) 180°
(n - 2)*180 = 1980
n-2 = 11
n = 13