ETC Montessori

# Geometric Constructions Using Cabri Jr.

\$30.00
Current Stock:
7
SKU:
ELC-3085
Weight:
0.50 LBS
Certifications:
CPSIA Exempt

Aimed at advanced upper elementary and middle school students. 24 activities allow your students to explore traditional geometric constructions using only a compass and a straight edge.

Students are first guided through the concrete constructions using a compass and a straight edge. They are then moved into more abstract geometric concepts the use of Cabri Jr. for the TI-84 calculator.

Each lesson is designed to engage students in group activities and analysis of concepts. Open ended questions are included with each lesson to encourage higher level thinking skills.

Constructions include:

• Constructing congruent Segments
• Constructing The Midpoint of any Given Segment
• The Mascheroni Construction of Finding the Midpoint of a Segment
• Constructing Congruent Angles
• Constructing the Bisector of an Angle
• Constructing an Equilateral Triangle
• Constructing a Perpendicular Bisector of a Given Segment
• Constructing the Perpendicular to a Line at a Given Point On the Line
• Constructing the Perpendicular to a Line at a Given Point Not on the Line
• Constructing a Parallel to a Given Line
• Constructing a Square
• Constructing a Right Triangle
• Constructing an Isosceles Right Triangle
• Constructing an Isosceles Trapezoid
• Constructing the Orthocenter of a Given Triangle
• Constructing the Centroid of a Triangle
• Constructing a Tangent to a Circle at a Point On the Circle
• Constructing a Tangent to a Circle Through a Point in the Exterior of the Circle
• Finding the Center of a Circle
• Circumscribe a Circle About a Given Triangle
• Inscribe a Circle in a Triangle
• Divide a Given Segment into Specified Number of Congruent Segments
• Constructing a Fourth Segment in Proportion to Three Given Segments
• Constructing a Segment Whose Length is the Geometric Mean of Two Other Segments

STANDARDS
View the standards that are met through this material.

***For those who want to use the calculator to perform these constructions please note that the TI-84 Plus comes preloaded with the application. No additional purchases are required. If you are using the TI-83 you will need to visit the Texas Instrument Educational website to download Cabri Jr. free of charge. ***