Strand: Shape and Space
General Outcome: Use direct and indirect measurement to solve problems.
9SS1. Circle Properties – Solve problems and justify the solution strategy, using the following circle properties:
· The perpendicular from the centre of a circle to a chord bisects the chord.
· The measure of the central angle is equal to twice the measure of the inscribed angle subtended by the same arc.
· The inscribed angles subtended by the same arc are congruent.
· A tangent to a circle is perpendicular to the radius at the point of tangency.
General Outcome: Use direct and indirect measurement to solve problems.
9SS1. Circle Properties – Solve problems and justify the solution strategy, using the following circle properties:
· The perpendicular from the centre of a circle to a chord bisects the chord.
· The measure of the central angle is equal to twice the measure of the inscribed angle subtended by the same arc.
· The inscribed angles subtended by the same arc are congruent.
· A tangent to a circle is perpendicular to the radius at the point of tangency.
Prerequisite skills needed from previous grades:
Properties of a circle; circumference, radius, diameter (Khan Academy video)
(Learn Alberta Interactive)
Properties of triangles (Learn Alberta Ineractive)
(Khan Academy video)
Pythagorean Theorem (Learn Alberta Interactive)
(Khan Academy video)
¨ I can solve problems using properties of chords in circles. (Learn Alberta Interactive)
¨ I can solve problems using properties of angles in circles. (Learn Alberta Interactive)
¨ I can solve problems using the tangent of a circle. (Learn Alberta Interactive)
¨ I can solve problems using properties of angles in circles. (Learn Alberta Interactive)
¨ I can solve problems using the tangent of a circle. (Learn Alberta Interactive)