35 thoughts on “6R 20/05- Maths (Angles in regular polygons)

  1. Silver:

    1. Pentagon = 5 sides, 35 triangles, the sum of interior angles add up to 540 degrees.
    Nonagon = 9 sides, 9 triangles, the sum of interior angles add up to 1260 degrees.
    Decagon = 10 sides, 8 triangles, the sum of interior angles add up to 144 degrees.
    Hexagon = 6 sides, 6 triangles, the sum of interior angles add up to 120 degrees.

  2. Pentagon:5 sides 35 triangles
    Angles add up to 540 degrees
    Nonagon:9 sides 9 triangles
    Angles add up to 1260 degrees
    Decagon:10 sides 8 triangles
    Angles add up to 144 degrees
    Hexagon:6 sides 6 triangles
    Angles add up to 120 degrees

  3. 1). Hexagon, two down a vertical line, and two on a horizontal line.
    2).The interior angles of an 8 sided octagon add up to 1080.
    3).Heptagon as more sides than a hexagon but fewer than a octagon. An octagon has eight sides whilst a hexagon has 6 sides, so the only number that is in between those two values is the number 7, the specific seven sided shape is called a heptagon.
    4).y= 150 Degrees
    5).y= 36 Degrees
    6).y= 30 Degrees
    7).y= 48 Degrees
    8).y= 72 Degrees
    9).y= 72 Degrees

  4. Pentagon:5 sides 35 triangles
    Angles add up to 540 degrees
    Nonagon:9 sides 9 triangles
    Angles add up to 1260 degrees
    Decagon:10 sides 8 triangles
    Angles add up to 144 degrees
    Hexagon:6 sides 6 triangles
    Angles add up to 120

  5. 1.)What is a regular polygon?
    5 sided pentagon
    A.)A Hexagon has,
    6 sides.
    4 triangles.
    180 x 6 = 1180
    B.)A Pentagon has,
    7 sides.
    5 triangles.
    180 x 5 = 900.

  6. 1A.)Hexagon.
    B.)Octagon.
    C.) Heptagon.
    2.) 150 degrees.
    B.) 36 degrees.
    C.) 30 degrees.
    D.) 48 degrees.
    E.) 72 degrees.
    F.) 72 degrees.
    3.) Alex’s shape is a Pentagon. Tommy’s shape is a hexagon. Dora’s shape is a Triangle.

  7. 1.Square this is because you can fit 4 equal triangles in there this is because a square is all equal.
    2.Octoan this is because it has 8 sides.
    3.Heptagon 900 degrees

  8. 1.
    Pentagon:
    5 sides
    35 triangles
    Angles add up to 540 degrees
    Nonagon:
    9 sides
    9 triangles
    Angles add up to 1260 degrees
    Decagon:
    10 sides
    8 triangles
    Angles add up to 144 degrees
    Hexagon:
    6 sides
    6 triangles
    Angles add up to 120
    2.
    Her shape is a hexagon
    His shape is an octagon
    Her shape is a heptagon

    • Think you have got these all correct – well done.
      Are you able to ‘reason’ your answers please? This will help with your understanding.

      • Her shape is a hexagon because if you split a polygon into 4 triangles it is a hexagon.
        His shape is an octagon because the sum of the interior angles in an octagon is 1080 degrees.
        Her shape is a heptagon because it has more sides than Rosie but less than Amir and that turns out to be a heptagon.

  9. Q1)What is a regular polygon ?
    5 sided pentagon
    A)The Hexagon
    Has 6 sides.
    Has 4 triangles.
    180 x 6 = 1180
    B)The Pentagon
    Has 7 sides.
    Has 5 triangles .
    180 x 5 = 900.

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