Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Counting the Number of Basic 2 D Shapes in a Set of Figures

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on identifying various 2D shapes in a set of figures.
Activity
CK-12 Foundation

Ck 12: Area of Composite Shapes

For Students 9th - 10th
[Free Registration/Login Required] Students explore how to break down shapes to determine the area of a figure. Click challenge me to answer practice questions and click learn more to watch a video.
Unit Plan
Mangahigh

Mangahigh: Shape: Quadrilaterals Inscribed in Circles

For Students 9th - 10th Standards
Determine the missing angle measures of quadrilaterals inscribed in circles.
Interactive
Mangahigh

Mangahigh: Shape: The Parts of a Circle

For Students 9th - 10th Standards
Test your knowledge of the parts of a circle.
Interactive
Mangahigh

Mangahigh: Shape: Circumference of a Circle

For Students 9th - 10th Standards
Determine the circumference of a circle or simple arc lengths.
Interactive
Mangahigh

Mangahigh: Shape: Radius and Chord Rule for Circles

For Students 5th - 7th
Test your knowledge of radius and chord rules for circles.
Interactive
Mangahigh

Mangahigh: Shape: Isosceles Triangles Inside Circles

For Students 9th - 10th Standards
Determine isosceles triangles inside a circle made from chords and radii.
Interactive
Mangahigh

Mangahigh: Shape: Inscribed and Central Angles in Circles

For Students 9th - 10th Standards
Use theorems to prove ideas of inscribed and central angles in circles.
Interactive
Mangahigh

Mangahigh: Shape: Inscribed Angles in Circles

For Students 9th - 10th Standards
Use theorems to prove inscribed angles in circles.
Interactive
Mangahigh

Mangahigh: Shape: Radius and Tangent Rule for Circles

For Students 9th - 10th Standards
Determine the rules for radius and tangents of circles.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Seven Circles Ii

For Teachers 9th - 10th Standards
In this task, seven pennies are placed in a circle so that they are all touching one in the center and their neighbors. Learners are asked to find as many rigid motions of the plane as they can which are symmetries of this configuration...
Interactive
E-learning for Kids

E Learning for Kids: Math: Market Place: 2 D Shapes and Patterns

For Students K - 1st
On this interactive site, students learn to identify squares, circles, and triangles.
Study Guide
Oswego City School District

Regents Exam Prep Center: Area of Polygons and Circles

For Teachers 3rd - 6th Standards
How would you find the area of a polygon or circle? Explore this concept with engaging activities at this test prep site. Here you will find detailed problem solving strategies with accompanying visuals, a reference table with formulas,...
Unit Plan
Khan Academy

Khan Academy: Name Shapes 3

For Students K - 1st Standards
Practice identifying circles, triangles, squares, rectangles, rhombuses, trapezoids, and hexagons. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
Khan Academy

Khan Academy: Equal Parts of Circles and Rectangles

For Students 1st - 3rd Standards
Practice telling if shapes are divided into 2 or 4 equal sections. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a tutorial video, or receive hints.
eBook
Mathigon

Mathigon: Geometry: Circle and Pi: Conic Sections

For Students 9th - 10th
The circle is one of four different shapes which can be created using "slices" through a cone, a 3-dimensional solid that has a circular base joined to a single point (called the vertex) by a curved side. If you tilt a cone, you get an...
Unit Plan
Khan Academy

Khan Academy: Equal Parts of Circles and Rectangles

For Students Pre-K - 1st Standards
In this exercise, students practice identifying equal parts of circles and rectangles. Students receive immediate feedback and have the opportunity to get hints, watch a tutorial video, and try questions repeatedly.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Areas of Combined Figures Involving Circles

For Students 6th - 8th
[Free Registration/Login may be required to access all resource tools.] In this lesson studednts find the areas of combined figures involving parts of circles. Students examine guided notes, review guided practice, watch instructional...
Unknown Type
Khan Academy

Khan Academy: Inscribed Shapes

For Students 9th - 10th Standards
Find missing angles and lengths in inscribed shapes. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Handout
Geometry Help

Geometry Help: Inscribed Shapes

For Students 9th - 10th Standards
Explains the basic concept of inscribed shapes with step-by-step instructions and methods for solving specific problems on your own relating to this topic.
Unit Plan
Khan Academy

Khan Academy: Challenge Problems: Inscribed Shapes

For Students 9th - 10th Standards
Solve three challenging problems that apply properties of inscribed shapes to find an arc length or a missing angle.
Unit Plan
Khan Academy

Khan Academy: Challenge Problems: Circumscribing Shapes

For Students 9th - 10th Standards
Solve two challenging problems that apply properties of tangents to find the perimeter of a circumscribing shape.
Interactive
Study Pad

Splash Learn: Partition Shapes: Halves and Fourths

For Students 1st Standards
[Free Registration/Login Required] Answer questions about the halves and fourths of circles and rectangles, and collect coins for each correct answer.
Interactive
Other

Kinderweb: Educational Children's Games

For Students Pre-K - 1st Standards
Use this site to practice identifying shapes, colors, and animals with these interactive games.