Maths Challenge
Maths challenge.net: Peculiar Perimeter
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.
Maths Challenge
Maths challenge.net: Corner Circle
This is a "three star" geometry problem where prior knowledge of circles and triangles is recommended to solve this circle in the corner problem.
Maths Challenge
Maths challenge.net: Shaded Cross
Find the area of this tilted cross with your geometry skills.
CK-12 Foundation
Ck 12: Cross Sections and Nets: Cereal Box Grid
[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.
CK-12 Foundation
Ck 12: Interactive Geometry: 9.5 Modeling in Three Dimensions
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.
Khan Academy
Khan Academy: Surface Area Using Nets
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.
Khan Academy
Khan Academy: Surface Area Using Nets
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.
CK-12 Foundation
Ck 12: Plix: Motion: Determining Net Force
[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...
National Council of Teachers of Mathematics
The Math Forum: Polyhedra Nets Paper
Contains six examples of polyhedra nets (cube, tetrahedron, octahedron, dodecahedron, icosahedron, cubosctahedron).
CK-12 Foundation
Ck 12: Geometry: Heights of Cylinders Given Surface Area
[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...
Other
Teach Net: Brain Binders
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.
Maths Challenge
Maths challenge.net: Glass in the Door
Use your knowledge of volume and weight to solve this posed problem of finding the weight of a glass in a door.
Maths Challenge
Maths challenge.net: Circular Pipes
A realistic world problem using the knowledge of chords and the parts of a circle to solve. Test your knowledge on this brain teaser!
Maths Challenge
Maths challenge.net: Leaning Ladders
Use your right triangle solving skills to solve this ladders in a hole problem.
Maths Challenge
Maths challenge.net: Ice Cream Cone
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.
Maths Challenge
Maths challenge.net: Chequered Floor
A problem involving patterns to find the solution to this sequence problem.
Maths Challenge
Maths challenge.net: Triangle Area
Find the area of this triangle in a coordinate plane.
Maths Challenge
Maths challenge.net: Pentagon Star
An area problem using your knowledge about pentagons.
Maths Challenge
Maths challenge.net: Equal Angles
A geometric proof. Prove two angles in this model are equal in measure.
Maths Challenge
Maths challenge.net: Measuring Mountains
Use your triangle solving skills to solve this triangle problem and then apply it to the real world.
Maths Challenge
Maths challenge.net: Annulus
An annulus of a circle is defined and then a proof like problem is posed involving area and radius of circles.
Maths Challenge
Maths challenge.net: Semi Circle Lunes
A lune of a circle is defined and a problem of finding the area of two lunes is given.
Maths Challenge
Maths challenge.net: Rectangular Circles
An area problem involving finding the area of a rectangle and a circle. The problem may be made into a general proof as well.
Maths Challenge
Maths challenge.net: Cables
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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