Circles Flashcards
What is the formula for the circumference of a circle?
C = pi x d
What is the formula for the diameter of a circle if given the radius?
d = 2r
What is the formula for the diameter of a circle if given the circumference?
d = c divided by pi
What is the formula for the area of a circle?
A = pi x r squared
What is the circumference?
The perimeter of a circle
What is the diameter?
A line that runs directly through the centre of a circle
What is the radius of a circle?
Half of the diameter
What is a chord?
A line that runs off centre of a circle
What is a minor segment?
The smaller piece of a circle created by a chord
What is a major segment?
The bigger piece of a circle created by a chord
What is a tangent?
A line that touches a circle at just one point
What is a minor sector?
A smaller piece of circle created by two radii
What is a major sector?
The bigger piece of a circle created by two radii
What is a minor arc?
A small section of the circumference
What is a major arc?
A big section of a circumference
