Answer:

2. Heptagon

has 7 sides

exterior angle of heptagon

=51.4°

interior angle of heptagon

=128.6°

solution:

• formula (n-2)180°

7(sides of heptagon) -2

=5

• 180×5=900°
• 900÷7(sides)= 128.6° - interior angle
• 180-128.6=51.4° -exterior angle

54+54+54+54+54+54+54=

378(exterior angle)

•900(sum of interior angles ) - 378= 522

522 ÷7=74.6° interior angle

answer

• exterior angle
• 54°
• interior angle
• 74.6°