Inscribed Angle Teacher Resources

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This is a fun lesson plan that explores the relationship between inscribed angles and central angles in the same circle. Learners use dynamic geometry software such as GeoGebra, Geometer's Sketchpad, or Cabri to construct and measure various angles formed by radii and chords. They make conjectures, draw conclusions, and discuss their findings. If dynamic geometry software is not available, the lesson can easily be adapted for use with conventional measuring and construction tools.
High schoolers construct circles and inscribed angles of circles.  In this circles and inscribed angles of circles lesson, students use Geometer's Sketchpad for the Ti-89 to discover properties of inscribed angles of a circle.  High schoolers measure the angle of the inscribed angle and compare it to the arc length.  Students find and inscribed angle that passes through the diameter and measure the angle measures.
Tenth graders investigate angles inscribed in a circle.  In this geometry lesson, 10th graders explore the relationship between the measure of the inscribed angle and its intercepted arc.  The dynamic nature of the TI-nspire handheld allows students to conjecture and test the veracity of their conjecture. 
Students explore the concept of central and inscribed angles.  In this central and inscribed angles theorem lesson, students use Cabri Jr. to draw circles and construct central and insribed angles.  Students measure angles and determine the ratio of an insribed angle to the central angle to be 1/2. 
Tenth graders explore inscribed angles.  In this geometry lesson, 10th graders investigate the relationship between an inscribed angle and its intercepted arc.  The dynamic nature of the geometry utility allows for conjecture and verification.
Tenth graders investigate the Inscribed Angle Theorem.  In this geometry lesson, 10th graders explore the relationship between an inscribed angle and its intercepted arc by examining the relationship between the central angle and the inscribed angle.    
Young scholars calculate the inscribed angle of a triangle. In this geometry lesson, students identify the angle created by intersection of a triangle and a circle. They see the relationship between the arc and the angle.
Students analyze inscribed angles and intercepted arcs and explore the relationships between the two. They investigate the properties of angles, arcs, chords, tangents, and secants to solve problems involving circles.
This detailed lesson plan leads your learners through an investigation of the relationships between central, inscribed, and circumscribed angles of a circle. The opening activity reviews central and inscribed angles and their intercepted arcs by having learners create problems for a partner to solve. After discussing their solutions, learners work in small groups to complete a worksheet that contains five diagrams showing circles with angles formed by radii, chords, diameters, secants, and tangents. Referring to a list of possible description options, pupils determine the exact figures that form each angle, measure the angle with a protractor, then interpret the result in relation to the measures of the central angle and intercepted arcs.
Use this detailed lesson plan to guide learners in discovering the relationship between central angles and inscribed angles that intercept the same arc in a circle. Your mathematicians construct circles and angles, then measure the angles and use their data to make conjectures and informally state the Central Angle Theorem. Constructions and measurements can be done with a compass and protractor, Geometer's Sketchpad, or the handy online interactive tool linked in the resource.  
Students differentiate between the different properties of arcs, arc lengths, chords, and chord lengths. In this circles activity, students calculate the arc length of a given circle, and find the measure of the inscribed angles of a circle and a polygon.
Students use Geometer's Sketchpad or Patty Paper Geometry to explore and write conjectures about chords, tangents, arcs and angles. In this geometric conjecture instructional activity, students examine what a conjecture is as it relates to geometric properties. Students explore central angles and inscribed angles while writing conjectures about the relationship between the measure of these angles.
Young scholars construct inscribed angles using Cabri Jr. They draw a circle on their graphing calculator, then construct an inscribed angle and measure its angle measures. Learners drag the inscribed angle around the circle. They make conjectures about the relationship between arc measure and inscribed angle measure.
In this central and inscribed angles activity, 10th graders identify and solve 20 different problems that include determining inscribed angles and intercepted arcs. First, they determine the measure of point P if the given angles are diameters. Then, students calculate the values of x and justify their answer.
In this inscribed angles instructional activity, 10th graders solve 11 different problems that are related to determining the measurement of various inscribed angles. First, they name the intercepted arc for an angle, the inscribed angle, and the central angle. Then, students find the measure of each angle listed, including each arc measurement.
Tenth graders explore angles inscribed in circles.  In this geometry lesson, 10th graders explore the relationship between the measure of an inscribed angle and its intercepted arc.  Students investigate angles inscribed in semicircles and inscribed quadrilaterals.    
In this inscribed angle activity, students identify inscribed angles. They determine the value of inscribed angles. This one-page activity contains 14 multi-step problems.
In this inscribed angles worksheet, 10th graders solve 13 various types of problems related to inscribed angles in geometry. First, they identify a circle illustrated and each arc of the circle. They, students find the measure of each angle of the triangle located inside this circle. They also write a paragraph proof to show that ABCD is an isosceles trapezoid.
Farming is full of mathematics, and it provides numerous real-world examples for young mathematicians to study. Here, we look at a cylinder-shaped storage silo that has one flat side. Given certain dimensions, students need to determine the current storage capacity and design a new storage facility to use for an anticipated increase in production. The activity uses knowledge of the Pythagorean Theorem, area of a circle, properties of triangles, understanding of volume, unit analysis, and percentage increase.  
Teach your learners how to investigate the relationship between a central angle and an inscribed angle which subtend the same arc of a circle. The dynamic nature of Cabri Jr. provides opportunity for conjecture and verification.

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