GEOMETRY BASICS

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Across
  1. 4. OBTUSE ANGLE IS ......NINETY DEGREES
  2. 7. SHAPES CAN BE OPEN OR ...?
  3. 8. ANGLES THAT LOOK LIKE CORNERS OF A PAGE
  4. 9. SHAPE WITH 3 SIDES
  5. 12. INSTRUMENT USED TO MEASURE ANGLES
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  1. 1. BASIC UNIT OF GEOMETRY
  2. 2. NUMBER OF SIDES IN A RECTANGLE
  3. 3. PART OF A LINE WITH TWO END POINTS
  4. 5. ANGLES LESS THAN 90 DEGREES
  5. 6. ANGLE THAT IS 180 DEGREES
  6. 10. THE POINT WHERE 2 ARMS OF AN ANGLE MEET
  7. 11. YOU CAN MEASURE A RAY. TRUE OR FALSE?
  8. 13. 2 OF THESE ARE USED TO MAKE AN ANGLE