Gregory Hunter

This chart compared six types of quadrilaterals with nine different properties. Students must mark each box as a Y if the property applies to the quadrilateral, and a N if it does not apply. When the activity is reviewed as a class, they can color the Y's green and the N's red. Once the boxes have been colored, students can discuss any patterns they see with the quadrilaterals. For example, if the property applies to a rectangle, rhombus, and square, then it will also apply to all parallelogra

The three key concepts of the Polygon Angle-Sum Theorem are outlined on these notes. I gave them to my students as a study guide before a quiz and the Chapter test. It shows the formulas to solve for the sum of the interior angles of a polygon, the measure of 1 interior angle of a regular polygon, and the measure of 1 exterior angle of a regular polygon. The students that had difficulty remembering which formula applied to different practice problems benefited from having these examples in fro

Students will need a ruler and protractor to complete this investigation. Students measure the lengths and angle measures given and determine the properties of perpendicular and angle bisectors. For the investigation on the 2nd page (angle bisectors), I suggest showing students that a 90 degree angle can be drawn from the side length to the given points using the edge of a ruler instead of the protractor. This will give them an accurate line through the point and an estimated congruent length.

My students have difficulty identifying the correct triangle congruence theorem or postulate. Many will have difficulty understanding how to label and read the diagram to determine the congruence statement. I created this resource as a way to minimize these mistakes. I printed out both pages and laminated them for the students to reference while they practiced identifying the congruence theorems. I hope it helps and I appreciate feedback. If you think something should be changed on here, pleas

Supplies Needed: Ruler and Protractor Students will measure the segments and angle measures, and determine the midpoint to draw the midsegment of the triangle. Students will then measure the midsegment length and the angle measures shown to identify the properties of midsegments.

Supplies Needed: Protractor and Ruler This is a good Parallelogram Properties Investigation prior to the written guided notes. Students are using the tools to observe the relationships within parallelograms.

This is a nice investigation for students to determine the rule/formula of the Polygon Angle-Sum Theorem. Student's observe the number of triangles formed after drawing diagonals and determine a relationship between the number of sides and triangles. You can then give them a polygon, such as a pentadecagon, to determine the sum of the angle measures without drawing the figure.