Angle properties crossword

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Across
  1. 3. Lines that are an equal distance apart at every point along them
  2. 5. Angles about a point add up to 360 ̊(a complete _______)
  3. 7. An angle in the same relative position as another. It can be found by looking for and F formed.
  4. 9. A measure of turn
  5. 12. Angles adding up to 180 ̊
  6. 14. An instrument used to measure angle
Down
  1. 1. when two straight lines cross, the angles opposite each other are the same size.
  2. 2. Two angles contained within the Z formed when a line crosses two parallel lines
  3. 4. a flat geometric figure that has three sides and three angles always add up to 180 ̊
  4. 6. Most common unit of measurement of angle
  5. 8. a flat geometric figure that has four sides and four angles always add up to 360 ̊
  6. 10. All sides of the triangle are equal
  7. 11. A triangle that has two sides of equal length
  8. 13. A triangle with all sides of different lengths