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Use the formula to work out what the internal angles total: sum of internal angles = (5 - 2) x 180°. 540° = 3 x 180°. What would one angle be worth in a regular pentagon? Just divide 540 by the ...
- Angles, lines and polygons - Edexcel Polygons - BBC
The sum of exterior angles of a polygon is 360°. The formula...
- Angles in polygons - KS3 Maths - BBC Bitesize
This polygon is a scalene triangle. It is irregular, and all...
- Angles, lines and polygons - Edexcel Polygons - BBC
The sum of exterior angles of a polygon is 360°. The formula for calculating the size of an exterior angle is: exterior angle of a polygon = 360 ÷ number of sides. Learn about and revise angles ...
If it is a Regular Polygon (all sides are equal, all angles are equal) Shape Sides Sum of Interior Angles Shape Each Angle; Triangle: 3: 180° 60° Quadrilateral: 4: 360° 90° Pentagon: 5: 540° 108° Hexagon: 6: 720° 120° Heptagon (or Septagon) 7: 900° 128.57...° Octagon: 8: 1080° 135° Nonagon: 9: 1260° 140°..... Any Polygon: n (n−2 ...
This polygon is a scalene triangle. It is irregular, and all its sides and angles are different. All the angles in a triangle sum 180°. 85 + 80 + 15 = 180°. The exterior angle for each vertex ...
- Is It A polygon?
- Types of Polygons
- Remembering
Polygons are 2-dimensional shapes. They are made of straight lines, and the shape is "closed" (all the lines connect up).
Regular or Irregular
A regular polygon has all angles equal and all sides equal, otherwise it isirregular
Concave or Convex
A convexpolygon has no angles pointing inwards. More precisely, no internal angle can be more than 180°. If any internal angle is greater than 180° then the polygon is concave. (Think: concave has a "cave" in it)
Simple or Complex
A simple polygon has only one boundary, and it doesn't cross over itself. A complexpolygon intersects itself! Many rules about polygons don't work when it is complex.
Quadrilateral
A QuadBike has 4 wheels
Pentagon
The "Pentagon" in Washington DC has 5 sides
Hexagon
Honeycomb has Hexagons
Properties of Regular Polygons. Polygon. A polygon is a plane shape (two-dimensional) with straight sides. Examples include triangles, quadrilaterals, pentagons, hexagons and so on. Regular. A "Regular Polygon" has: all sides equal and. all angles equal. Otherwise it is irregular.
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What do we know about regular polygons?
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How do you find the size of a polygon?
What is the exterior angle of a polygon?
What is the sum of exterior angles of a polygon?
What is the difference between a regular and a convex polygon?
If each exterior angle measures 10°, how many sides does this polygon have? Show Answer Use formula to find a single exterior angle in reverse and solve for 'n'.