Activity
Maths Challenge

Maths challenge.net: Peculiar Perimeter

For Students 9th - 10th Standards
This is a "three star" geometry problem where prior math problem skills and proof experience is recommended. Tile constructions may be used to solve this perimeter and area problem.
Activity
Maths Challenge

Maths challenge.net: Corner Circle

For Students 9th - 10th Standards
This is a "three star" geometry problem where prior knowledge of circles and triangles is recommended to solve this circle in the corner problem.
Activity
Maths Challenge

Maths challenge.net: Shaded Cross

For Students 9th - 10th Standards
Find the area of this tilted cross with your geometry skills.
Activity
CK-12 Foundation

Ck 12: Cross Sections and Nets: Cereal Box Grid

For Students 6th - 8th
[Free Registration/Login Required] Students will explore cross sections and nets of three dimensional objects. Click challenge me to answer practice questions and click learn more to watch a video.
eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 9.5 Modeling in Three Dimensions

For Students 9th - 10th Standards
Explore connections between a 2-dimensional net and a 3-dimensional box. Later in this section, use equations with variables to solve real world problems that use 2 and 3-dimensional objects.
Unknown Type
Khan Academy

Khan Academy: Surface Area Using Nets

For Students 6th - 8th Standards
In this exercise, students practice finding the surface area using nets. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Unit Plan
Khan Academy

Khan Academy: Surface Area Using Nets

For Students 5th - 7th Standards
Practice using the net of a 3D figure to find surface area. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Interactive
CK-12 Foundation

Ck 12: Plix: Motion: Determining Net Force

For Students 9th - 10th
[Free Registration/Login Required] Shown are three different systems with two forces acting upon it and a red vector showing the net force acting upon the system. Move the red dots to accurately reflect the net force experienced by each...
Activity
National Council of Teachers of Mathematics

The Math Forum: Polyhedra Nets Paper

For Students 9th - 10th Standards
Contains six examples of polyhedra nets (cube, tetrahedron, octahedron, dodecahedron, icosahedron, cubosctahedron).
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Heights of Cylinders Given Surface Area

For Students 6th - 8th
[Free Registration/Login may be required to access all resource tools.] In this lesson students will find the heights of cylinders given surface area and one other dimension. Students examine guided notes, review guided practice, watch...
Website
Other

Teach Net: Brain Binders

For Teachers 3rd - 5th
Brain binders are great teacher sources for problem solving and critical thinking with geometry. Students fold sheets of paper to create solid colors on each side. Various levels are included starting with two folds through five folds.
Activity
Maths Challenge

Maths challenge.net: Glass in the Door

For Students 9th - 10th
Use your knowledge of volume and weight to solve this posed problem of finding the weight of a glass in a door.
Activity
Maths Challenge

Maths challenge.net: Circular Pipes

For Students 9th - 10th Standards
A realistic world problem using the knowledge of chords and the parts of a circle to solve. Test your knowledge on this brain teaser!
Activity
Maths Challenge

Maths challenge.net: Leaning Ladders

For Students 9th - 10th Standards
Use your right triangle solving skills to solve this ladders in a hole problem.
Activity
Maths Challenge

Maths challenge.net: Ice Cream Cone

For Students 9th - 10th
Is summer close yet? Think about this yummy ice cream treat in a mathematical way! A problem of volume is posed for an ice cream cone.
Unknown Type
Maths Challenge

Maths challenge.net: Chequered Floor

For Students 9th - 10th Standards
A problem involving patterns to find the solution to this sequence problem.
Activity
Maths Challenge

Maths challenge.net: Triangle Area

For Students 9th - 10th Standards
Find the area of this triangle in a coordinate plane.
Activity
Maths Challenge

Maths challenge.net: Pentagon Star

For Students 9th - 10th
An area problem using your knowledge about pentagons.
Activity
Maths Challenge

Maths challenge.net: Equal Angles

For Students 9th - 10th Standards
A geometric proof. Prove two angles in this model are equal in measure.
Activity
Maths Challenge

Maths challenge.net: Measuring Mountains

For Students 9th - 10th Standards
Use your triangle solving skills to solve this triangle problem and then apply it to the real world.
Activity
Maths Challenge

Maths challenge.net: Annulus

For Students 9th - 10th Standards
An annulus of a circle is defined and then a proof like problem is posed involving area and radius of circles.
Activity
Maths Challenge

Maths challenge.net: Semi Circle Lunes

For Students 9th - 10th Standards
A lune of a circle is defined and a problem of finding the area of two lunes is given.
Activity
Maths Challenge

Maths challenge.net: Rectangular Circles

For Students 9th - 10th Standards
An area problem involving finding the area of a rectangle and a circle. The problem may be made into a general proof as well.
Activity
Maths Challenge

Maths challenge.net: Cables

For Students 9th - 10th Standards
This is a proof problem, considered a "three star" geometry problem requiring knowledge of proofs and properties of circles to solve this problem with cables in duct problem.

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