Answer:
Step-by-step explanation:
a = 13 ; b = 21 ; c = 27
S = (a + b + c)/2

s- a = 30.5 - 13 = 17.5
s - b = 30.5 - 21 = 9.5
s -c = 30.5 - 27 = 3.5
Area = 


A = 27°
Answer:
0
Step-by-step explanation:
-4x-20=-4(x+5)
-4x-20=-4x-20
0=0
Answer:
I completely understand
Step-by-step explanation:
Answer:
Step-by-step explanation:
The sum of adjacent angles traversed by a line must equal 180 degrees.
128+x=180
x=52