Answer:
171
Step-by-step explanation:
(133+206+x)/3 = 170
133+206+x = 510
339 + x = 510
x = 171
(133+206+171)/3 =
Answer:
The length of the sides are 9 units, 18 units and 11 units
Step-by-step explanation:
Let
x ----> one side of the triangle
y ----> the longest side of the triangle
z ----> the third side of the triangle
we know that
The perimeter of triangle is equal to

we have

so
----> equation A
-----> equation B
----> equation C
substitute equation B and equation C in equation A
solve for y


<em>Find the value of x</em>
---> 
<em>Find the value of z</em>
----> 
therefore
The length of the sides are 9 units, 18 units and 11 units
The answer is 120.
Needs full space
You need to add all of them up then devied by how many there are
A. Add up to 180 degrees. Hope this helps.