Video Course Library

High School Geometry lesson to apply triangle sum properties. Key topics include interior angles, exterior angles, corollary to a theorem, and triangles - scalene, isosceles, equilateral, acute, right, obtuse, equiangular.

High School Geometry lesson to prove triangles congruent by SAS and HL. Key topics include leg of a right triangle and hypotenuse.

High School Geometry lesson to apply triangle sum properties. Key topics include interior angles, exterior angles, corollary to a theorem, and triangles - scalene, isosceles, equilateral, acute, right, obtuse, equiangular.

High School Geometry lesson to use congruent triangles. Key topics include corresponding parts.

High School Geometry lesson to apply triangle sum properties. Key topics include interior angles, exterior angles, corollary to a theorem, and triangles - scalene, isosceles, equilateral, acute, right, obtuse, equiangular.

High School Geometry lesson to use properties of tangents. Key topics include chord, secant, tangent, and circle - center, radius, diameter.