Which polygon has an interior angle sum of 1080°?

2 answers:

8 0

Answer:

Octagon

Step-by-step explanation:

The sum of the interior angles of a polygon is

sum = 180° (n - 2) ← n is the number of sides, so

180° (n - 2) = 1080° ( divide both sides by 180° )

n - 2 = 6 ( add 2 to both sides )

n = 8 ← octagon

3 0

Step-by-step explanation:

The sum of the interior angles in a regular polygon is given by the formula 180(n – 2), where n is the number of sides in the polygon. An octagon has eight sides, so the sum of the angles of the octagon is 180(8 – 2) = 180(6) = 1080 degrees. Because the octagon is regular, all of its sides and angles are congruent.

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vodomira [7]

Answer:

50 degree

Step-by-step explanation:

the angle sum property of the equilateral triangle is =180 degree

since, 52 degree +78 degree +x =180 degree

130 degree + x =180 degree

x= (180-130) degree

<h3> x= 50 degree</h3>

hope this helps you out