Maths Triangles

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Across
  1. 3. bisector the line which cuts the side on a perpendicular, and it divides the line into two equal halves
  2. 5. the halve of sum of all the sides ( halve of perimeter)
  3. 8. the point of concurrency of the angle bisectors in a triangle
  4. 10. point of concurrency of all the altitudes in a triangle
  5. 11. a line emerging from one vertex and making a 90° angle on the opposite side
Down
  1. 1. the point of concurrency of all the perpendicular bisectors in a triangle
  2. 2. the total area enclosed under a polygon
  3. 4. bisector is a line dividing the angle into two halves and landing on the other side
  4. 6. line emerging from one vertex and bisecting the opposite side
  5. 7. the sum of the length of all the sides of a polygon is called the perimeter
  6. 9. point of concurrency of all the medians in a triangle