What does slope have to do with lines? Pupils work with lines and determine the slope of the lines informally and with the slope formula. Groups use their knowledge to calculate the slopes of parallel and perpendicular lines. They also...

Proving triangles are similar is often an exercise in applying one of the many theorems young geometers memorize, like the AA similarity criteria. But proving that the criteria themselves are valid from basic principles is a great...

Can you use triangles to create a circle? Learners develop the unit circle using right triangle trigonometry. They then use the unit circle to evaluate common sine and cosine values.

Does complex number multiplication have the class spinning? Here's a resource that helps pupils explore and discover the geometric effect of multiplying complex numbers. In the 14th installment in the 32-part unit groups look at the unit...

In the 16th lesson in the series of 32 the class uses the concept of complex multiplication to build a transformation in order to reflect across a given line in the complex plane. The lesson breaks the process of reflecting across a line...

The second day of a two-part lesson on motion introduces the class to circular motion. Pupils learn how to incorporate a time parameter into the rotational matrix transformations they already know. The 24th installment in the 32-part...

The slope makes a difference. Given an equation of a circle and point, scholars determine the relationship of the slope of a line through the point and the number of intersections with the circle. After graphing the relationship, pupils...

Students use Cartesian coordinates to plot current natural disasters. They relate location of natural disasters to their specific major project countries. Students tie in geometry within this lesson as connected to spatial relationships...

Students calculate the slope of the equation In this algebra lesson, students graph coordinate pairs of linear equations and identify the relationship between x and y values and slope.  They differentiate between functions and...

Students investigate the ties that architecture and math have in common. They focus on works of architecture in the world that is considered of great significance. Students use the internet to find building images from around the world....

Students explore the relationship of angles as it relates to 2 and 3-D shapes. In this geometry lesson, students differentiate between acute, obtuse, right, alternate interior, exterior and adjacent angles. They manipulate a math...

Students investigate symmetry in the real world. For this geometry lesson, students inter-relate math and technology. They create and name a variety of polygons.

In this linear and quadratic function worksheet, students examine and solve a system of equations. They graph each function on a coordinate plane. This one-page worksheet contains ten problems.

Learners graph lines in a coordinate plane. In this geometry lesson, students graph lines on a coordinate plane, and identify the slope. They calculate the volume, area and perimeters of the shapes created on a coordinate plane.

In this geometry worksheet, 10th graders are given polygons on a coordinate plane. They calculate the area and perimeter of each shape, by counting the length of each square on the graph.

In this geometry worksheet, 10th graders match ordered pairs to the correct quadrant on a coordinate plane. They tell in which quadrants x and y values will be positive or negative. There are 19 questions.

For this geometry worksheet, 10th graders use the midpoint formula to calculate the midpoint of a line segment given a pair of coordinates. There are 8 questions with an answer key.

In this geometry learning exercise, students solve for the area of polygons. They are given shaded shapes on a coordinate plane and asked to calculate the area. There are 2 questions with an answer key.

In this graphing practice worksheet, 5th graders plot squares on a graph with an x and y axis. Once students locate each square they must color a certain design in that box to create a larger picture.

Students investigate the concept of ellipses and how they are used in a variety of geometry problems with a focus upon writing an equation given certain criteria. They draw an ellipse while developing the equation examining the x and y...

Learners examine images and preimages of a mapping and identify isometry. They view images by M.C. Escher, observe teacher demonstrations, and create a translation image, a rotation image, and a dilation.

In this rotational symmetry activity, 10th graders identify and compare 10 different figures illustrated on the sheet. They write the order of rotational symmetry seen in each figure as compared to the others. They also define an object...

Learners explore the concept of translations. In this translations lesson, students discuss similarities and differences between images and pre-images. Learners apply translations to coordinates of figures. Students use patty paper to...

Students perform transformations and translation on a coordinate plane. In this geometry lesson, students move shapes around on a graph identifying translation, image, and transformation. This lesson has an interactive part online that...