Determine whether each regular polygon tessellates the plane. Explain.

equilateral triangle
a.
yes; measure of interior angle = 60°
b.
no; measure of interior angle = 60°
c.
yes; measure of interior angle = 120°
d.
no; measure of interior angle = 120°

Question

Determine whether each regular polygon tessellates the plane. Explain.
 
equilateral triangle
a.
yes; measure of interior angle = 60°
b.
no; measure of interior angle = 60°
c.
yes; measure of interior angle = 120°
d.
no; measure of interior angle = 120°

anonymous · Answer

Yes, measure of interior angle=60 degrees.
Equilateral means all angles equal
sum of interior angles in triangle is 180 degrees
so each angle is 60 degrees
as 60 divides into 360 without remainders, you can tessellate a equilateral triangle