1. A triangle with all sides equal is called ______.
2. The instrument used for drawing circles in technical drawing is ______.
3. The sum of the interior angles of a triangle is ______.
4. A square has ______ equal sides.
5. A right angle measures ______.
6. A triangle with two equal sides is called ______.
7. The longest chord in a circle is the ______.
8. The interior angles of a square are each ______.
9. The distance from the centre of a circle to the circumference is called ______.
10. The sum of angles in a quadrilateral such as square or rectangle is ______.