Triangles and Hexagons
Get started by thinking about patterns that combine triangles and hexagons.
In this course, you'll solve delightful geometry puzzles and build a solid foundation of skills for problem-solving with angles, triangles, and polygons. You'll also improve your visual intuition and learn how to come up with clever, creative solutions to tough challenges.
This course is the perfect place to start (or continue) your exploration of geometry if you know how to measure angles and calculate the areas of rectangles, circles, and triangles; and want to learn the next level of geometric problem-solving techniques.
Get started with 2D on a journey with polygons and clever geometry puzzles.
Beware: even a cute little angle can bite!
Practice finding missing angles.
Learn sneaky strategies for solving tough angle problems.
Solve angle problems involving polygons that have many sides.
Investigate scenarios where the sum of several angles stays constant.
Tackle this last set of angle challenges by combining all of the techniques you've learned so far.
Endless complexity can come from just three sides.
In what circumstances can you make a triangle?
When are triangles the same?
Investigate a special case where a triangle can be drawn two ways.
Uh... Where did the missing square go?
Celebrate the surprising truths inherent to the mathematics of space.
Warm up your problem-solving muscles by exploring these shape-combining diagrams.
Add lines to help clarify your thinking.
Sometimes it's easier to find the area of what's left after your shape is removed...
What happens when shapes overlap?
When bend, stretch, move and spin parts of these figures, the areas change shape but don't change size.
From perimeters and pi to stellations and tessellations.
When all of the sides are the same length and all of the angles are the same measure, what else must be true?
Can you be absolutely certain that each of these polygons is regular?
Apply the Pythagorean Theorem to find length and area measures of regular polygons.
Play around with these polygons made out of matchsticks, q-tips, and toothpicks.
By extending all of the edges of a polygon you can make beautiful stars.
Practice your skills polygon problem-solving with these dissected polygon puzzles.