Teacher Resources

## Collection Contents

### Construct the inscribed and circumscribed circles of a triangle, and prove properties of angles for a quadrilateral inscribed in a circle.

by Allen Wolmer

Exercises from Illustrative MathematicsA set of 8 exercises, commentary, and solutions
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### Inscribe a rectangle in a circle. Understand the symmetries of inscribed rectangles across a diameter.

by Allen Wolmer

Teacher and Student versions of full lesson from engageNY
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### Quadrilaterals Inscribed in Circles

by Allen Wolmer

Lessons, videos, exercises, and text from CK-12. Additional resources available at this site.
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### Students show that a quadrilateral is cyclic if and only if its opposite angles are supplementary.

by Allen Wolmer

Students show that a quadrilateral is cyclic if and only if its opposite angles are supplementary.Students derive and apply the area of cyclic quadrilateral ABCD as 1/2 AB·CD·sin(w) where w is the measure of the acute angle formed by diagonals AB and CD.Teacher and Student versions of full lesson from engageNY
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