Western Local School District

videos with an are Khan Academy videos

GEOMETRY

ANGLES

Angles in a triangle sum to 180° proof (vid)*

Practice:  Find angles in triangles

Isosceles & equilateral triangles problems (vid)*

Practice: Find angles in isosceles triangles

Triangle exterior angle example(vid)*

Worked example: Triangle angles (intersecting lines)(vid)*

Worked example : Triangle Angles (diagram)(vid)*

Practice:  Find angle measure using triangles

PYTHAGOREAN THEOREM

Intro to Pythagorean Theorem (vid)*

Practice:  Find right triangle sides

Practice:  Find isosceles triangle side lengths 

Practice:  Find right triangle side lengths

Pythagorean Theorem Example(vid)*

Pythagorean Theorem with Isosceles Triangles(vid)*

Practice: Using the Area of a Square to Visualize Pythagorean Theorem

Use Pythagorean theorem to find area of an isosceles triangle (vid)*

Practice: Use Pythagorean Theorem to find perimeter

Practice: Use Pythagorean Theorem to find area

Pythagorean theorem word problem: carpet(vid)*

Pythagorean theorem word problem: fishing boat(vid)*

Pythagorean theorem in 3D(vid)*

Practice: using the Pythagorean Theorem in 3D

DISTANCE FORMULA

Distance Formula(vid)*

Practice: Distance between 2 points: