How to use similar triangles to measure the height of objects.
How to define a chord; how to describe the effect of a perpendicular bisector of a chord and the distance from the center of the circle.
How to define the apothem and center of a polygon; how to divide a regular polygon into congruent triangles.
How to define arc length and how it is different from arc measure; how to calculate the length of an arc.
How to identify the centroid and the way it divides each of the medians.
How to define a central angle and find the measure of its intercepted arc; how to describe the intercepted arcs of congruent chords.
How to use a protractor to measure an angle.
How to calculate the measure of an inscribed angle.
How to define the midsegment of a trapezoid, calculate its length, and relate it to a triangle midsegment.
How to derive the equation for a circle using the distance formula.
How to define a secant; how to find the length of various secants in circles.
How to classify a triangle based on its side lengths and angle measures.
How to find the measure of one angle in any equiangular or regular polygon.
How to find the sum of the exterior angles in a polygon and find the measure of one exterior angle in an equiangular polygon.
How to define a circle and identify its main parts.
How to perform and describe a dilation.