Overview of similarity: congruent angles, proportional corresponding sides
How to define the tangent function for all angles.
How to identify a trapezoid and its special properties.
How to identify a kite and its special properties.
How to derive the area formula of a kite based on the rectangle formula; how to calculate the area of a rectangle using diagonal lengths.
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 define the sine ratio and identify the sine of an angle in a right triangle.
How to define the cosine ratio and identify the cosine of an angle in a right triangle.
How to define the tangent ratio and identify the tangent of an angle in a right triangle.
How to use inverse trig functions to find angles in right triangles.
How to calculate the area of any triangle using two sides and an included angle.