Shapes and Angles

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Across
  1. 3. The number of acute angles in the shape below
  2. 5. The total number of angles in the shape below
  3. 8. The shape below has 12 of these angles
  4. 10. A triangle with 3 equal length sides
  5. 12. A triangle with no right angles but 3 different length sides
Down
  1. 1. A 2D shape with 3 sides
  2. 2. An angle >90 degrees
  3. 4. A triangle with 2 equal length sides
  4. 6. A 2D shape with 8 corners
  5. 7. The number of sides on a pentagon
  6. 9. The number of right angles in the shape below
  7. 11. An angle of 90 degrees