Circle Theorem - Resource Pack
<p><strong>Lesson Contents: Circle Theorems</strong></p>
<p><strong>Download Includes:</strong></p>
<ul>
<li>A comprehensive PowerPoint lesson designed for interactive use with a clicker, mouse, or keyboard to navigate through animations and display fully animated and worked solutions.</li>
</ul>
<p><strong>Topic of Study: Circle Theorems</strong></p>
<p><strong>Differentiated Objectives:</strong></p>
<ol>
<li>
<p><em>Developing Learners will be able to:</em></p>
<ul>
<li>Apply circle theorems to find missing angles.</li>
</ul>
</li>
<li>
<p><em>Secure Learners will be able to:</em></p>
<ul>
<li>Justify, with reason, the circle theorems they apply to find missing angles.</li>
</ul>
</li>
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<p><em>Excelling Learners will be able to:</em></p>
<ul>
<li>Solve unfamiliar problems using circle theorems.</li>
</ul>
</li>
</ol>
<p><strong>Main Components:</strong></p>
<p>The main segment of the lesson unfolds with a step-by-step approach:</p>
<ul>
<li>Walked through examples demonstrate the application of circle theorems.</li>
<li>Practice questions on accompanying worksheets progress from basic queries on the just-introduced theorem to exam-style questions utilizing each of the theorems previously introduced.</li>
<li>All solutions are provided directly within the PowerPoint presentation for easy reference.</li>
</ul>
<p><strong>Circle Theorem Statements:</strong></p>
<ol>
<li>
<p><em>Angles in the Same Segment:</em></p>
<ul>
<li>Angles in the same segment of a circle are equal.</li>
</ul>
</li>
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<p><em>Opposite Angles in a Cyclic Quadrilateral:</em></p>
<ul>
<li>Opposite angles in a cyclic quadrilateral add up to 180 degrees.</li>
</ul>
</li>
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<p><em>Angle at the Center:</em></p>
<ul>
<li>The angle at the center of a circle is twice any angle at the circumference subtended by the same arc.</li>
</ul>
</li>
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<p><em>Angles in a Semi-Circle:</em></p>
<ul>
<li>Angles formed in a semi-circle are always right angles.</li>
</ul>
</li>
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<p><em>Alternate Segment Theorem:</em></p>
<ul>
<li>An angle between a chord and a tangent is equal to the angle in the alternate segment.</li>
</ul>
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<p><em>Tangent-Radius Perpendicularity:</em></p>
<ul>
<li>A radius at the point of tangency to a circle is perpendicular to the tangent.</li>
</ul>
</li>
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<p>*Cyclic Quadrilateral Diagonals:</p>
<ul>
<li>The diagonals of a cyclic quadrilateral bisect each other at right angles.</li>
</ul>
</li>
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<p><em>Chord Bisection:</em></p>
<ul>
<li>A chord that passes through the center of a circle is bisected by the circle into two equal parts.</li>
</ul>
</li>
</ol>
<p>This lesson is structured to empower learners at various levels, ensuring a comprehensive understanding of circle theorems and proficiency in their application across different scenarios.</p>