Triangles (and more angles)

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Across
  1. 2. An isosceles triangle has one axis of ______.
  2. 4. There are one ____ and eighty degrees in a half turn
  3. 6. The // lines on a shape mean that the sides are the same ____
  4. 8. A triangle with two equal angles and sides
  5. 9. A 90 degree angle is a ____ angle
Down
  1. 1. In an equilateral triangle all angles will be _____ degrees.
  2. 3. A triangle with three equal sides and angles
  3. 5. A triangle with three sides of different lengths
  4. 7. The interior angles of a triangle always add up to one hundred and ____ degrees.