Triangles

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Across
  1. 1. When an angle amounts/is less than 90* but more than 0* it is...
  2. 5. a straight line which links two points without extending beyond tchem
  3. 7. When an angle amounts more than 90* it is...
  4. 9. a quadrilateral that has two pairs of opposite sides that are parallel
  5. 10. The .. of a triangle is a straight line that joins one point (vertex) of a triangle to the mid point od the opposite site
  6. 12. in a right triangle is the side of the triangle that it is opposite to the right angle
  7. 16. A line which divides an angle into two equal parts
  8. 18. ...opposite angles are angles which are opposite each other when two lines cross
  9. 19. is a straight line or distance from the center to the edge of a curve
  10. 21. The .. of a triangle is a straight line that joins one point
Down
  1. 2. a triangle which sides are equal
  2. 3. a triangle which has got two equal sides
  3. 4. two figures or objects are congruent if they have the same shape and size, or if one has the same shape and size as the mirror image of the other
  4. 6. When an angle amounts 90* it is...
  5. 8. When to lines intersect at right angle, they are...
  6. 11. is formed by six identical square faces joined along their edges
  7. 13. A triangle which every side is different
  8. 14. angles that share a common vertex and edge but do not share any interior points
  9. 15. The ... od a triangle is perpendicular from one of its vertices to the opposite site
  10. 17. When an angle amounts 90* it is...
  11. 20. The union of two rays that have the same end point is called