Circle theorems Flashcards
“The angle at the centre is twice the angle at the circumference”
“The angle in a semicircle is 90°”
“A radius and a tangent meet at right angles”
Tangents from an external point are equal in length
“Opposite angles in a cyclic quadrilateral add up to 180°”
“Angles in the same segment are equal”
“alternate segment theorem”
What is the intersecting chord theorem (internal)?
What is the intersecting chord theorem (external)?
Exact trig values
Compound interest formula?
sum of interior angles of a polygon equation?
( n − 2 ) × 180
Size of exterior angle in a regular polygon
360/n
formula for nth term of arithmetic sequence?
formula for sum of arithmetic sequence?
Volume of cone formula?
Curved surface area of cone formula?
Volume of sphere formula?
Surface are of sphere formula?
Equation of a circle?
