Properties of Circles

Question 1

What is the 1st important property of a circle?

Answer 1

The angle of a semi circle is a right angle

Question 2

What is the 2nd important property of a circle?

Answer 2

The perpendicular line from the centre to a chord bisects the chord

Question 3

What is the 3rd important property of a circle?

Answer 3

The radius of a circle at a given point on its circumference is perpendicular to the tangent of the circle at this point

Question 4

What is a tangent

Answer 4

a line that touches a curve or surface at a single point but doesn’t intersect it

Question 5

What is a diameter

Answer 5

a line that passes through the centre point of a circle and reaches the other end of the circumfrence

Question 6

What is a chord?

Answer 6

A line that starts at one side of a circles circumference and passes through to the other but not necessarily through the centre point like a diameter

Question 7

What is a segment?

Answer 7

The area of a circle between the circumference and a chord or an arc

Question 8

How can you prove lines are perpendicular?

Answer 8

By calculating their gradients and ensuring that m1 times m2 = -1

Question 9

How to check a right angle?

Answer 9

Use Pythagraus theorm

Question 10

What is the hypotenuse?

Answer 10

The side of the triangle opposite the right angle