Lesson Plan
Curated OER

Building Bridges

For Teachers 7th - 9th
Students identify the different types of bridges. Using the internet, they research information on how they are built by completing a scavenger hunt. Locating a specific area, they determine which type of bridge would be appropriate and...
Worksheet
Curated OER

Beyond the Blue Horizon...Advanced

For Students 9th - 12th
For this calculating the horizon worksheet, students solve 6 problems using algebra, derivatives and calculus to find the formula for the line-of-sight horizon, the distance along a planet, the horizon distance and the rates of change...
Lesson Plan
Curated OER

Angles in Standard Positions

For Teachers 9th - 11th
Young scholars identify positive and negative angles using the Unit Circle. In this pre-calculus lesson, students identify the different angles on a unit circle using the coordinate plane and the four different quadrants as a guide. They...
Lesson Plan
Curated OER

DEAD MAN'S CURVE

For Teachers 9th
Ninth graders, after being given a unique scenario and a task sheet on Dead Man's Curve, calculate and explain the force needed to keep a car on a curve using a set of formulas and a geometric property of circles. They utilize and create...
Worksheet
Curated OER

Seven Sets of Area Problems

For Students 10th - 11th
For this area worksheet, students solve for the area of rectangles, parallelograms, triangles, trapezoids, kites, regular polygons, circles, and surface area.  The worksheets is divided into seven different sets of problems.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Tangent Lines

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This concept teaches students about tangent lines and how to apply theorems related to tangents of circles.
Unit Plan
Cuemath

Cuemath: Tangent

For Students 9th - 10th Standards
Learn about the tangent definition in geometry, tangent geometry, tangent to a circle, tangent line equation. Check-out the solved examples for better understanding and try your hand at the tangent line calculator or solving a few...
Interactive
Government of Alberta

Learn Alberta: Math Interactives: Exploring Circle Geometry Properties

For Students 6th - 8th
Investigate circles, namely their angles, chords, and tangents using this highly interactive Learn Alberta math. Explore a number of circle geometry properties that can be used to determine unknowns. Be sure to follow the link to the...
Lesson Plan
Science Buddies

Science Buddies: Tangent Circles and Triangles

For Teachers 9th - 10th Standards
Here is a project that combines Computer Science and Mathematics. The two circles are tangent to one another at point A. Their diameters are parallel. Prove that points A, D and F are co-linear. You'll also learn how to create an...
Lesson Plan
Science Buddies

Science Buddies: Circles, Tangent Lines and Triangles

For Teachers 9th - 10th Standards
Here is a project that combines Computer Science and Mathematics. The semicircle has two tangent lines that meet at point T. You need to prove that a line drawn from A to T bisects CD. You'll also learn how to create an interactive...
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Segments From Secants and Tangents

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Apply the Tangent Secant Segment Theorem.
eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 8.7 Tangent Lines to Circles

For Students 9th - 10th Standards
When a line intersects a circle in exactly one point the line is said to be tangent to the circle or a tangent of the circle.
eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 17.1 Tangent Ratio

For Students 9th - 10th Standards
Explore and understand tangent ratios.
Unit Plan
Khan Academy

Khan Academy: Determining Tangent Lines: Lengths

For Students 9th - 10th Standards
Solve two problems that apply properties of tangents to determine if a line is tangent to a circle.
Unit Plan
Khan Academy

Khan Academy: Determining Tangent Lines: Angles

For Students 9th - 10th Standards
Solve two problems that apply properties of tangents to determine if a line is tangent to a circle.
Unit Plan
Khan Academy

Khan Academy: Challenge Problems: Radius & Tangent

For Students 9th - 10th Standards
Solve two challenging problems that apply properties of tangents to find the radius of a circle with a tangent.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Sine, Cosine, Tangent

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] This concept teaches students to find the sine, cosine, and tangent of right triangles.
Unknown Type
Khan Academy

Khan Academy: Tangents of Circles Problems

For Students 9th - 10th
Solve problems related to tangents of circles. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Handout
CK-12 Foundation

Ck 12: Geometry: Properties of a Circle Study Guide

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This study guide reviews the terminology for circles (tangent, arcs, central angles) and the equation for a circle.
Activity
Texas Instruments

Texas Instruments: The Tangent Ratio

For Teachers 9th - 10th Standards
In this activity students explore the tangent ratio. Students construct a right triangle using perpendicular lines, and a line that forms the hypotenuse of the triangle. When students construct the hypotenuse line it is very important...
Activity
University of Illinois

University of Illinois Urbana Champaign: Egg Math: Spherical Geometry

For Students 9th - 10th Standards
This site contains an experiment that demonstrates how transporting a tangent vector around a closed path on a sphere will cause it to come back twisted. [Requires Java.]
Lesson Plan
Texas Instruments

Texas Instruments: Glencoe Geometry: Cabri Jr.: Exploring Tangents

For Teachers 9th - 10th
Young scholars can use Cabri Jr. to explore some of the characteristics of tangents.
eBook
Mathigon

Mathigon: Geometry: Triangles and Trigonometry: Trigonometry

For Students 9th - 10th
This lesson focuses on trigonometry including the trigonometric functions: sine, cosine, and tangent.
Interactive
Mangahigh

Mangahigh: Shape: Radius and Tangent Rule for Circles

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

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