Polygons

https://andymath.com/angles-of-polygons/
https://andymath.com/area-of-regular-polygon-apothem/

Similar Figures

https://andymath.com/similar-figures-simularity-ratio-area-ratio-volume-ratio/

Volume and Surface Area

Intro to Volume

Nets of Polyhedra

Volume Rectangular Prisms

Surface Area Rectangular Prisms

Volume and Surface Area of Cubes

Triangular Prisms- Surface Area

Cylinders Volume and Surface Area

Cones Volume and Surface Area

Pyramids Volume and Surface Area

Spheres Volume and Surface Area

Properties of Parallelograms

https://www.showme.com/sh/?h=iUs6To0
https://cdn.kutasoftware.com/Worksheets/Geo/6-Properties%20of%20Parallelograms.pdf

Angles in Circles

Inscribed Angles

Central Angles

Exterior Angles

Interior Angles

https://andymath.com/angles-in-circles/

https://cdn.kutasoftware.com/Worksheets/Geo/11-Secant%20Angles.pdf

Segments in Circles

Segment lengths in circles

Arc Length and Area of a sector

https://andymath.com/arc-length-geometry/

https://andymath.com/area-of-a-sector/

Equations of Circles

https://andymath.com/circle/

Review

Midpoint Formula

https://andymath.com/midpoint-formula-2/

Distance Formula

https://andymath.com/distance-formula/

https://andymath.com/triangle-inequality-theorem/

https://andymath.com/pythagorean-inequalities/

Pythagorean Triples

Pythagorean Triples are right triangles with whole number sides. They satisfy $a^2+b^2=c^2$

$3,4,5$
$5,12,13$
$7,24,25$
$8,15,17$
$9,40,41$
$11,60,61$
$12,35,37$
$13,84,85$
$15,112,113$
$16,63,65$
and there are many more…

You can create even more triples by multiplying all the numbers by the same constant.
$3,4,5$
$3(2),4(2),5(2)\to 6,8,10$
$3(3),4(3),5(3)\to 9,12,15$
$3(4),4(4),5(4)\to 12,16,20$
and you can keep going…

BONUS QUESTION: Can you find a pythagorean triple where the area of the triangle is equal to the perimeter?

These can be used as shortcuts on many math problems!

The Centroid, Orthocenter, Incenter, & Circumcenter

Notes

Helpful Links

$\bullet$ Interactive Triangle Centroid Link

$\bullet$ Interactive Triangle Circumcenter Link

$\bullet$ Interactive Triangle Orthocenter (geogebra.org)

Triangle Midsegment Theorem

https://andymath.com/triangle-midsegment-theorem/

Special Right Triangles

https://andymath.com/special-right-triangles/

https://cdn.kutasoftware.com/Worksheets/Geo/8-Special%20Right%20Triangles.pdf

Trigonometry

https://andymath.com/right-triangle-trigonometry/

https://andymath.com/angle-of-depression-and-elevation/

https://cdn.kutasoftware.com/Worksheets/Alg2/Right%20Triangle%20Trig%20Missing%20Sides%20and%20Angles.pdf

Desmos Marbleslide Challenge

DESMOS Marbleslide Challenge Set 1