Fill the circle geometry board

Exercise and reference answers

Clues and terms

1. Clue

   A portion of the circumference of a circle.

   Item

   Arc

2. Clue

   The perimeter or boundary line of a circle.

   Item

   Circumference

3. Clue

   Any straight line from the centre of a circle out to a point on its boundary.

   Item

   Radius

4. Clue

   A special chord that passes through the centre of the circle.

   Item

   Diameter

5. Clue

   The part of a circle that a chord cuts off.

   Item

   Segment

6. Clue

   A straight line that touches a circle at only one point.

   Item

   Tangent

7. Clue

   What a tangent forms with the radius drawn at the point of contact.

   Item

   Right angle

8. Clue

   A four sided figure with all four of its sides being chords of one circle.

   Item

   Cyclic quad

9. Clue

   A quadrilateral with both pairs of opposite sides parallel.

   Item

   Parallelogram

Instructions

A clue is called out. Tap the cell it names. Three marks in a line wins.

Explanation