CONSTRUCTIONS 16, 17, 21, 22
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue for that number. (c) Project Maths Development Team

Check
Across:
1. A point where two sides of a triangle meet 5. This circle passes through all the vertices of the triangle. 6. A circle that lies inside a triangle and is tangent to each of its sides is known as the. 7. The point that cuts a line in half. 10. A line that intersects a circle at exactly one point. 11. The point where the perpendicular bisectors of the each side of a triangle meet is known as the. 12. The point where the perpendicular from the vertices of the opposite sides of a triangle meet. 13. The radius of a circumcircle.

Down:
1. The plural of vertix. 2. The point of intersection of the bisectors of the angles of a triangle is known as the. 3. The line joining the vertex of a triangle to the midpoint of the opposite side is known as the 4. A line that is at ninty degrees to another line. 8. The radius of an incircle is known as the. 9. The point where the three medians of a triangle meet is known as the.

(c) Project Maths Development Team