EEZY BREEZY MATHS
This usually only takes a second.
EEZY BREEZY MATHS
This usually only takes a second.
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1 section · 10 Qs
Exterior angles of any polygon add to 360°. In a regular polygon they are all equal, so one exterior angle = 360° ÷ number of sides. An interior angle and its adjacent exterior angle add to 180°. The sum of interior angles is (n − 2) × 180°.
Section A: Regular polygon angle facts
Practice
1 section · 6 Qs
Count the sides of the regular polygon, then calculate one exterior angle as 360° ÷ number of sides. All exterior angles are equal and they add to 360°.
Section B: Calculating exterior angles
Practice
1 section · 6 Qs
Count the sides n, then one interior angle of a regular polygon is ((n − 2) × 180°) ÷ n. You can also find the exterior angle first (360° ÷ n) and subtract from 180°.
Section C: Calculating interior angles
Practice
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EEZY BREEZY MATHS
For 11+ families
Exterior angles of any polygon add to 360°. In a regular polygon they are all equal, so one exterior angle = 360° ÷ number of sides. An interior angle and its adjacent exterior angle add to 180°. The sum of interior angles is (n − 2) × 180°. Count the sides of the regular polygon, then calculate one exterior angle as 360° ÷ number of sides. All exterior angles are equal and they add to 360°.
Shape · 3 sections · 22 practice questions
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