Activity
Maths Challenge

Maths challenge.net: Tri Angles

For Students 9th - 10th Standards
A geometry proof involving exterior angles of a triangle.
Activity
Maths Challenge

Maths challenge.net: Right Triangle Equal Parts

For Students 9th - 10th Standards
A geometry proof problem involving a right triangle and finding angles of equal measure.
Activity
Maths Challenge

Maths challenge.net: Bag of Balls

For Students 9th - 10th Standards
A "three star" geometry problem which requires prior math problem solving skills and proof writing skills to solve this "Bag of Balls" radius of balls problem.
Activity
Maths Challenge

Maths challenge.net: Shaded Triangle

For Students 9th - 10th Standards
A great geometry problem of area, encorperating many learned skills.
Activity
Maths Challenge

Maths challenge.net: Sloping Square

For Students 9th - 10th Standards
A geometry problem of finding the area of a sloped square within a square.
Activity
Maths Challenge

Maths challenge.net: Circumscribed Triangle

For Students 9th - 10th Standards
Find the area of this circumscribed triangle with your geometry skills.
Activity
Maths Challenge

Maths challenge.net: Alley Ladders

For Students 9th - 10th Standards
This is a "three star" geometry problem where prior math problem skills and proof experience is recommended to solve this relationship between the inverses of heights.
Activity
Maths Challenge

Maths challenge.net: Triangle in a Square

For Students 9th - 10th Standards
A "three star" geometry problem requiring some prior knowledge in math and proofs to maximize the area of an inscribed triangle in terms of the hypotenuse.
Activity
Maths Challenge

Maths challenge.net: Inscribed Rectangle

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 equal area of inscribed polygons problem.
Handout
Maths Challenge

Maths challenge.net: Three Circles

For Students 9th - 10th Standards
This is a proof problem, considered a "three star" geometry problem requiring knowledge of proofs and properties of circles.
Activity
Maths Challenge

Maths challenge.net: Maximum Square

For Students 9th - 10th Standards
A challenging proof like geometry of finding the square inscribed in a triangle.
Activity
Maths Challenge

Maths challenge.net: Isosceles Trapezium

For Students 9th - 10th Standards
This is a "three star" geometry problem where prior knowledge of problem solving and thinking through proofs is recommended to solve this trapezoid inscribed in a semicircle problem.
Activity
Maths Challenge

Maths challenge.net: Lunes

For Students 9th - 10th Standards
A "three star" geometry problem where some experience of math problem solving skills and knowledge of circles is recommended to solve this lunes (parts of a circles) area problem
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Cross Sections and Nets

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] This concept teaches students two ways to represent three dimensions in two dimensions: cross-sections and nets. Students examine guided notes, review guided...
eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 1.11 Surface Area and Nets

For Students 9th - 10th Standards
Explore surface areas and nets with 2D and 3D shapes.
Handout
CK-12 Foundation

Ck 12: Geometry: Representing Solids Study Guide

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This study guide gives an overview of isometric view, orthographic view, cross-section, and nets.
Interactive
SEN Teacher

Sen Teacher: Nets

For Teachers Pre-K - 1st Standards
Generate different "nets" for paper construction of common three-dimensional shapes: cube, cuboid, pyramid, cone, tetrahedron, cylinder, octahedron, rhombic prism, dodecahedron, pentagonal prism, and pentagonal prism.
Unknown Type
Khan Academy

Khan Academy: Nets of 3d Figures

For Students 6th - 8th Standards
In this exercise, students practice identifying the 2D nets of 3D figures. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Unit Plan
Khan Academy

Khan Academy: Nets of Polyhedra

For Students 5th - 7th Standards
Practice matching 2D nets to the 3D shapes the fold up into. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Lesson Plan
Alabama Learning Exchange

Alex: Nifty Nets

For Teachers 6th - 8th Standards
During this activity, students will create nets for prisms. They will find the volume and surface area of the shapes. They will also use interactive activities to review three-dimensional shapes.This lesson plan was created as a result...
Website
Maths Challenge

Maths challenge.net: Problem Solving Database

For Teachers 9th - 10th Standards
Need some challenging problem-solving work for your students in the following areas: Discrete, Geometry, Numbers, and Code Breaking? This is the place for an enormous database of problems aimed at high school age students. They are...
Activity
Maths Challenge

Maths challenge.net: Quadrilateral Parallelogram

For Students 9th - 10th Standards
A "three star geometry problem" requiring knowledge of how to complete geometric proofs and some prior math knowledge. This problem asks to prove that the mid points of any quadrilateral form a parallelogram.
Handout
Geometry Help

Geometry Help: What Are Parallel Lines in Geometry?

For Students 9th - 10th Standards
Explains the basic concept of parallel lines in Geometry with step-by-step instructions and methods for solving specific problems on your own relating to this topic.
Activity
Maths Challenge

Maths challenge.net: Unique Circle Equal Angles

For Students 9th - 10th Standards
A "three star geometry problem" - requiring the knowledge of biconditional statements and how to prove such problems.

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