Level 5 Geometry Learning Objects

Trigonometry.
Trigonometry develops the concept of trigonometry from simple comparisons to more formal approaches (more info).
Trigonometry: measuring with triangles
Trigonometry: similar triangles
Trigonometry: cosine
Trigonometry: sine
Trigonometry: tan
Trigonometry: using sine
Trigonometry: using cosine
Trigonometry: using tan
Trigonometry: find hypotenuse
Trigonometry: find angles
National Library of Virtual Manipulatives.
NLVM: Space manipulatives
Pentominoes
Tessellations
Pattern blocks
Geoboard
Platonic solids
Polyominoes
Golden rectangle
Learn Alberta.
Learn Alberta: Exploring Space series (more info).
Exploring diameter and circumference
Exploring relationships of angles
Learn Alberta.
Learn Alberta: Exploring Measurement series (more info).
Exploring triangles
Exploring trigonometry