CK-12 Foundation
Ck 12: Geometry: Indirect Proof in Algebra and Geometry
[Free Registration/Login may be required to access all resource tools.] Write algebraic and geometric indirect proofs.
Oswego City School District
Regents Exam Prep Center: Working With Logic
Test your logic and knowledge of conditionals, biconditionals, negations, conjunctions, and disjunctions in this twelve-question quiz. Answer each question on your own, then see what the answer and the reasoning behind the answer are.
Math Planet
Math Planet: Geometry: If Then Statement
If-then statements are explained throught the use of examples and a video lesson. [1:16]
CK-12 Foundation
Ck 12: Geometry: Converse, Inverse, and Contrapositive
[Free Registration/Login may be required to access all resource tools.] In this lesson students find the converse, inverse, and contrapositive of conditional statements. Students examine guided notes, review guided practice, watch...
CK-12 Foundation
Ck 12: Geometry: If Then Statements
[Free Registration/Login may be required to access all resource tools.] This concept teaches students to rewrite statements in if-then form and determine the hypothesis and conclusion. Students examine guided notes, review guided...
CK-12 Foundation
Ck 12: Geometry: Converse, Inverse, and Contrapositive
[Free Registration/Login may be required to access all resource tools.] This concept introduces students to converses, inverses, contrapositives, and biconditional statements. Students examine guided notes, review guided practice, watch...
CK-12 Foundation
Ck 12: Geometry: Conjectures and Counterexamples
[Free Registration/Login may be required to access all resource tools.] This concept teaches students to make conjectures and provide counterexamples. Students examine guided notes, review guided practice, watch instructional videos and...
Oswego City School District
Regents Exam Prep Center: Conjunction: And
Learn what a conjunction is and why it is important to know what a conjunction is when using logic to solve mathematical problems. This website includes examples of the conjunction "and" used in mathematical sentences and a "truth table."
Other
Juegos, Acertijos, Y Recreaciones Matematicas
In Spanish. A variety of logic problems, including puzzles and word problems with links to the answers. An excellent site to engage Spanish speaking students.
Oswego City School District
Regents Exam Prep Center: Negation: Not
Use this website to help you hone your critical thinking and math-problem solving skills. Learn what "Negation," is and how it applies when you are working on mathematical problems and sentences.
University of Cambridge
University of Cambridge: Nrich: Shapely Tiling
On this one page interactive website expand your logic, Motion Geometry and pattern recognition knowledge while working on this challenge. The solution is available to double check your solution.
University of Cambridge
University of Cambridge: Nrich: Adding Triangles
Sharpen your logic and geometry skills by finding the area of a triangle. Solution available.
Maths Challenge
Maths challenge.net: Kitchen Floor
A "one star" geometry problem that requires finding the visual pattern and applying logic with basic math skills to solve how many tiles are needed to complete the kitchen floor pattern.
Maths Challenge
Maths challenge.net: Counting Triangles
A "one star" geometry problem that requires finding the visual pattern and applying logic with pattern recognition to solve this number of triangles problem.
Maths Challenge
Maths challenge.net: Shaded Grid
A "one star" geometry problem that requires finding the visual pattern and applying logic with basic math skills to find the patterns.
Maths Challenge
Maths challenge.net: Shading Pattern
A "one star" geometry problem that requires finding the visual pattern and applying logic with basic math skills to solve.
Maths Challenge
Maths challenge.net: Perimeter Sequence
A "one star" geometry problem that requires finding the visual pattern and applying logic with basic math skills to find the perimeter from the sequence.
Maths Challenge
Maths challenge.net: Counting Triangles Again
A "one star" geometry problem that requires finding the visual pattern and applying logic with basic math skills to find triangles in a pattern.
National Council of Teachers of Mathematics
Nctm: Figure This: Keeping Cool
Is it better to by block ice or crushed ice? Use your logical reasoning and measurement skills to solve this challenge that compares surface area of block ice and the same block cut into three cubes. A one page activity from the NCTM...
University of Cambridge
University of Cambridge: Nrich: Transformations on a Pegboard
This one page website can expand your logic, Motion Geometry and pattern recognition knowledge. The solution is available to double check your answers.
Maths Challenge
Maths challenge.net: Beam of Light
A "one star" geometry problem that requires finding the visual pattern and applying and pattern extensions to solve the beam of light problem.
Maths Challenge
Maths challenge.net: False Ceilings
A "one star" geometry problem that requires finding the visual pattern and applying and pattern extensions to solve the false ceiling problem.
Maths Challenge
Maths challenge.net: Pathed Pathways
A "one star" geometry problem that requires visualizing to find how many different patterns can be made.
University of Cambridge
University of Cambridge: Nrich: Where Are They?
Test your logic, polygon properties, and pattern recognition skills working on this challenge. Solution included.