How to derive the equation for the distance between two points using the Pythagorean Theorem.
How to use a protractor to measure an angle.
How to find the angles of a triangle by creating a linear equation.
How to use the distance formula to derive the equation for a circle.
How to measure the sine and cosine of 150.
How to derive the area of a segment formula.
How do we measure sine and cosine of pi/4?
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 derive the formula to calculate the area of a sector in a circle.
How to prove that opposite angles in a cyclic quadrilateral are congruent; how to prove that parallel lines create congruent arcs in a circle.
How to identify a segment from the vertex angle in an isosceles triangle to the opposite side.
How to relate corresponding altitudes, medians and angle bisectors in similar triangles.