In this section, Sal Khan covers the distance formula and midpoint formula introduced in CXhapter 1. Look at soeme of these videos and practices to help you with this concept.
This section of Khan Academy offers many videos and tutorials based on parallel and perpendicular lines.
Sal Khan offers many lessons, video tutorials, and practices on triangle congruence. Follow the link for more support in proving the sum of measures of angles in a triangle are 180. Try some challenging triangle angle problems.
Watch Sal Khan deliver some lessons on triangle congruence by transformation, use postulates and theorems (SSS, SAS, AAS, ASA, HL Theorems and CPCTC) to prove triangles are congruent.
Khan Academy offers many tutorials and practices on Properties and Attributes of triangles. This section includes video tutorials and interactive practices based on the perpendicular bisectors & circumcenter, angle bisector &incenter, altitudes & orthocenter, and medians & centroid of triangles.
A section in Chapter 5-5 Inequality in One triangle covers the Triangle Inequality Theorem. Sal Khan delivers a lesson on Triangle Inequality Theorem, followed by an interactive practice.
Sal Khan covers right triangles in this section. He introduces the Pythagorean Theorem and shows how to use it in three examples. There is also an interactive practice to better support your progress!
Sal Khan covers the last section of Chapter 5 - Special Right Triangles. He covers the 30-60-90 triangle side ratios and the 45-45-90 tirangle side ratios. There is also an interactive practice in using special right triangles. He also shows you how to find the area of a regular hexagon using special right triangles. Try it!
Sal Khan delivers lessons on properties and proofs of quadrilaterals including parallelograms, special parallelograms (rectangles, squares, rhombus). He also has a video on area of parallelograms.
This section of Khan Academy focuses on perimeter and area of non standard shapes. Sal Khan covers area and perimeter of parallelogram, trapezoid, kite, and rhombus
Sal Khan covers most of the topics in Chapter 7 including definition of similarity, dilation, triangle similarity (postulate and theorems), and finding area using similarity ratio. Try some challenging similarity problems.
Sal Khan delivers basic trigonometry lessons by using sine, cosine, and tangent ratios. He shows several examples of when and how to use them, and offers many interactive practices in trigonometry.
Sal Khan offers lessons and interactive practices in law of sines and cosines. Use the interactive practices to better your understanding in these two theorems!
Sal Khan offers lessons and interactive practice on solid geometry - volume and surface area of 3D models. In this section, he covers lessons on volume and surface area of prisms, cylinders, pyramids, cones, and spheres.
Sal Khan covers a lesson and practice on cross sections, covered in Chapter 10, Section 1.
Sal Khan offers many lessons, video tutorials, and interactive practices on circles - arcs and sectors, central, inscribed and circumscribed angles, equation of a circle, area of inscribed triangle, and geometric models.