Ain't No River Wide Enough
Students simulate the process a surveyor would use to measure the width of a river by measuring length on one side of the river and angles formed by various reference points.https://education.ti.com/en/activity/detail/aint-no-river-wide-enough
Dilations with Matrices
Students use matrices to perform dilations centered at the origin of triangles. Students will explore the effect of the scale factor on the size relationship between the preimage and image of a polygon.https://education.ti.com/en/activity/detail/dilations-with-matrices
Area of Rectangles with Fixed Perimeter
The students will construct several rectangles with different dimensions, all having the same perimeter. The area of each rectangle is then computed and plotted against the width of each rectangle. The students will discover that the area is a quadratic function of the width. They will also dis...https://education.ti.com/en/activity/detail/area-of-rectangles-with-fixed-perimeter
Circles - Angles and Arcs
In this TI-84 family activity, students explore angles constructed in a circle and how their measures are related to the measures of the intercepted arcs.https://education.ti.com/en/activity/detail/angles-and-arcs
ASA Triangle Congruence
1.Construct an triangle and select two angles and the contained side to copy to a second triangle. 2.Measure sides and angles to visualize congruence properties 3.Try to alter the properties of their construction by moving the vertices of the original trianglehttps://education.ti.com/en/activity/detail/asa-triangle-congruence
Constructing Similar Triangles
Students investigate three different methods of constructing similar triangles.https://education.ti.com/en/activity/detail/constructing-similar-triangles_1
Tessellations
Students will explore tessellations of triangles and quadrilaterals. They will use the transformation tools of symmetry, reflections, rotations, and/or translations.https://education.ti.com/en/activity/detail/tessellations
Midsegments of Triangles
Students explore the properties of the midsegment, a segment that connects the midpoints of two sides of a triangle.https://education.ti.com/en/activity/detail/midsegments-of-triangles
Exterior & Remote Interior Angles
Students investigate an exterior angle and its two remote interior angles.https://education.ti.com/en/activity/detail/exterior--remote-interior-angles_1
Triangle Sides & Angles
Students will explore side and angle relationships in a triangle. First, students will discover where the longest (and shortest) side is located relative to the largest (and smallest) angle. Then, students will explore the Isosceles Triangle Theorem and its converse. Finally, students will determ...https://education.ti.com/en/activity/detail/triangle-sides--angles_1
Similar Figures Discovery Activity
Students will use Cabri Jr. to discover two properties of similar triangles: corresponding angles are congruent and corresponding sides are proportional.https://education.ti.com/en/activity/detail/similar-figures-discovery-activity
How Random!
Students use simulations and graphs to explore the common sense notion that repeatedly flipping a coin results in "heads up" about half of the time. First, they simulate an experiment by representing single coin flips with random numbers. Next, they use a given formula to simulate multiple coin f...https://education.ti.com/en/activity/detail/how-random_1
Properties of Parallelograms
Students will use Cabri Jr. to construct a parallelogram. They discover three properties of parallelograms in this activity: opposite sides are congruent, opposites angles are congruent, and diagonals bisect each other.https://education.ti.com/en/activity/detail/properties-of-parallelograms_6
Properties of Reflections
I use this activity in the beginning of the school year when introducing terminology such as angles, lines, segments, measures, perpendicular etc. The original material is from the SIMMS Integrated Mathematics Using Technology, I have adapted the activities to fit my objectives. Students have be...https://education.ti.com/en/activity/detail/properties-of-reflections
Properties of the Centers of a Triangle
Students investigate the sum of the measures of the interior angles of a triangle. This activity explores interior angles, and their relationship with the exterior angles of a triangle.https://education.ti.com/en/activity/detail/properties-of-the-centers-of-a-triangle
Points on a Perpendicular Bisector
Students will explore the relationship between a line segment and its perpendicular bisector. Once the concept of a point that is equidistant from two points is illustrated, extensions including isosceles triangles, kites, and chords in a circle may be explored.https://education.ti.com/en/activity/detail/points-on-a-perpendicular-bisector_1
Get on the Stick
Students use a CBR 2™ to measure the reaction time of catching a stick. They also learn how to interpret a box plot and make a five number summary of a single variable data set.https://education.ti.com/en/activity/detail/get-on-the-stick
Proof of the Pythagorean Theorem using Transformations
In this activity, students will explore visual proofs of the Pythagorean Theorem using area and transformations. They will use the Cabri™ Jr. app to perform translations on the squares constructed on the two legs and the hypotenuse of a right triangle to consolidate their understanding of the Pyt...https://education.ti.com/en/activity/detail/proof-of-the-pythagorean-theorem-using-transformations
Which Trapezoids Are Special?
Cabri Jr. allows students to look at several kinds of trapezoids in order to see which ones are special. With this activity students can see that an isosceles trapezoid is a special one. In a parallel manner, students can see why a parallelogram can be considered a special trapezoid. This acti...https://education.ti.com/en/activity/detail/which-trapezoids-are-special
Angles of a Triangle
In this activity, students will measure angles and investigate the relationships between interior and exterior angles of a triangle. They understand the definition of interior angles, exterior angles, adjacent angles, supplementary angles, and remote interior angles.https://education.ti.com/en/activity/detail/angles-of-a-triangle
Angles in Circles
The student will use the Cabri Jr. APP to discover the relationship between inscribed and central angles in a circle.https://education.ti.com/en/activity/detail/angles-in-circles
Angles in a Polygon
Students will expore the interior and exterior angle of 3 polygons and develop the formula to calculate the sum of degrees without the measurement of the angles being taken.https://education.ti.com/en/activity/detail/angles-in-a-polygon
Altitude, Median, and Angle Bisector of a Triangle
In this activity, you will construct special segments of a triangle named altitudes, medians, and angle bisectors, using their definitions. You will look at how an altitude, a median, and an angle bisector divide the area of a triangle.https://education.ti.com/en/activity/detail/altitude-median-and-angle-bisector-of-a-triangle
Angle Bisectors and Medians of Quadrilaterals
In this activity, students will construct angle bisectors and medians in quadrilaterals and explore the properties that appear to be true for four-sided figures. They may find it necessary to review the definitions and properties of special quadrilaterals in order to construct the figures.https://education.ti.com/en/activity/detail/angle-bisectors-and-medians-of-quadrilaterals
Angles and Transversals
Students explore the relationships of angles formed when two parallel or non-parallel lines are cut by a transversal. This activity investigates the terms: Transversal, corresponding angles, alternate interior angles, alternate exterior angles, same-side interior angles, and same-side exterior an...https://education.ti.com/en/activity/detail/angles-and-transversals