Answer:
Step-by-step explanation:
x+3y=1
Its equilateral ( all sides are equalA0
Also its acute.
D and F
A polygon is plane<span> shape with <em><u>straight</u></em> sides. Therefore, a pentagon is a polygon!</span>
Ans given below
-3r-12=-21
-3r=-21+12
-3r=-9
r=-9\-3
r=3
