Study

Year 9 - Angles in polygons L1 - Review

  •   0%
  •  0     0     0

  • How many internal triangles in this shape?
    5
  • how many internal triangles in this shape?
    3
  • What is the size of the missing angle? **extra**
    163 degrees (5 - 2 = 3 triangles x 180 = 540. Sum of other = 121 + 68 + 103 + 85 = 377. 540-377 =163)
  • What is this shape called?
    Hexagon
  • What is the size of the missing angle? **extra**
    115 degrees (5 - 2 = 3 triangles x 180 = 540. Sum of other = 90 + 135 + 112 + 88 = 425. 540-425 =115)
  • What is this shape called?
    Nonagon
  • What is the sum of interior angles in this shape?
    6-2 = 4 triangles x 180 = 720 degrees
  • How many internal triangles in a hexagon?
    4
  • What is the size of the missing angle? **extra**
    168 degrees (6 - 2 = 4 triangles x 180 = 720. Sum of other = 103+ 87 + 84 + 128 + 150 = 552. 720 - 552 =168)
  • What is a shape with 10 sides called?
    Decagon!
  • What is the sum of the interior angles in this shape?
    5 - 2 = 3 triangles x 180 = 540 degrees
  • What is a polygon with 7 sides called?
    Heptagon
  • What is a polygon with 4 sides called
    quadrilateral
  • What is the sum of the interior angles in this shape?
    7-2 = 5 triangles x 180 = 900 degrees
  • What is this shape called?
    pentagon
  • What is the size of the missing angle? **extra**
    120 degrees (6 - 2 = 4 triangles x 180 = 720. Sum of other = 90 + 90 + 130 + 140 + 150 = 600. 720 - 600 =120)
  • How many internal triangles in this shape?
    3
  • What is the sum of the interior angles in this shape?
    9-2 = 7 sides x 180 = 1260 degrees
  • What is this shape called?
    pentagon
  • What is the sum of the interior angles in this shape?
    6 - 2 = 4 triangles x 180 = 720 degrees
  • if a polygon has 9 sides what is it called?
    Nonagon!
  • How many internal triangles in this shape?
    4
  • In a REGULAR hexagon, what is the size of each angle? **extra**
    6-2 = 4 triangles x 180 = 720 divide by 6 sides = 120 degrees
  • In a REGULAR octagon, what is the size of each angle? **extra**
    8-2 = 6 x 180 = 1080 divide by 8 = 135 degrees