Geometry
Geometry guides,
with the theorem named.
Geometry rewards knowing which fact applies more than it rewards arithmetic. These guides name the theorem first, then show it doing the work on real numbers.
Guides
The Pythagorean Theorem, Explained
a squared plus b squared equals c squared, what each letter has to be, and how to find a leg rather than the hypotenuse. Three worked examples and practice.
How to Find the Area of a Triangle
Half base times height, the right-triangle shortcut, and the sine formula for when you have two sides and the angle between them. Worked examples and practice.
What this covers
- Right triangles and the Pythagorean theorem
- Area, and why the units are squared
- Choosing the right base and height
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