Curated OER
Discovering Perimeter
Twelfth graders apply perimeter measurement to items found in newspapers and calculate the cost in terms of feet or yards. They share answers and explanations with classmates.
Curated OER
Area of Parallelograms and Triangles
Learners explain the formula for finding the area of a paralellogram and its relation to the area of a rectangle. Finally, they construct the formula for the area of a paralellogram.
Curated OER
Right Triangle Geometry
Students study the basic principles of right triangle geometry needed to solve for unknown values of a right triangle. They apply and master the principles of right triangle geometry by solving problems.
Curated OER
Pythagorean Theorem
Students identify a right angle and right triangle. They perform WebQuests searching for similar figures and solve for the length of one of the sides given the other two.
Curated OER
Pythagorean Theorem and Special Right Triangles
Young scholars review the Pythagorean Theorem and apply it to word problems involving special right triangles.
Beacon Learning Center
Angles and Algebra
Students calculate angle measure for triangles and complementary/supplementary angles. After a lecture/demo, students utilize a worksheet imbedded in this plan to gain practice.
Curated OER
Testing For Congruent Triangles
Learners define and discuss congruency and the corresponding parts between congruent triangles. They create a pair of congruent triangles, test for congruency, and complete a worksheet.
Curated OER
Triangles
Third graders recognize geometric shapes with acute angles, make geometric shapes with acute angles on geoboards, and draw acute angles on geopaper.
Curated OER
Similar and Congruent Triangles
Students create and classify different types of triangles using an online geo-board. They explore the concepts of similar and congruent as they discover how to draw similar and congruent triangles.
Curated OER
How Tall Is That Flag Pole?
Students examine various triangles and discuss how similar triangles have sides that are proportional. They utilize an ancient Egyptian method to determine the height of a flagpole.
Curated OER
Pythagorean Theorem
Students explore how the Pythagorean Theorem works and how to apply it.
Curated OER
Triangle Puzzler
Students are introduced to some basic concepts of geometry. They explain that the definition of a triangle is a figure with three sides, three angles, and three points. Triangles can be named by using three points in their correct sequence.
Curated OER
Practice Problems
In this geometry activity, students practice finding the measure of 4 different angles. Students work independently as they refine their ability to correctly calculate the measure of an angle.
Curated OER
Parallel Lines and Triangles
In this triangles instructional activity, students solve 1 problem of multiple variables within a single picture of various triangles intersecting with a pair of parallel lines.
Curated OER
Can a Geometric Mean be Nice?
For this Geometry instructional (work)sheet, students are instructed on how to find the geometric mean. Students are then shown how the geometric mean is applied to proving similar triangles.
Curated OER
Pythagorean Theorem
Students solve right triangles using the Pythagorean Theorem. In this solving right triangles using the Pythagorean Theorem lesson, students find the missing side of a right triangle. Students find the hypotenuse given two...
Curated OER
Triangle Review
In this triangle worksheet, students draw the type of triangles described, 4 total. Space is provided for student's drawings. A reference web site is given for additional activities.
Curated OER
Rectangles and Squares
Pupils identify two dimensional shapes in the school environment. In this basic shapes lesson, students watch a video about rectangles and squares. Pupils find examples shapes in their classroom and draw them. Students present their...
Alabama Learning Exchange
Is It a Triangle?
Students explore the concept of triangle inequalities. For this triangle inequality lesson, students cut spaghetti noodles into given lengths. Students use the noodles to complete a worksheet about triangle...
Curated OER
Recognizing Triangles
In this triangle worksheet, students circle all of the triangles in a shape of patterns. Worksheet gives a reference web site for additional activities.
Curated OER
Circus of Shapes
In this geometric shapes worksheet, students analyze a picture of a skyscraper tower with many shapes. Students color all the triangles.
Noetic Learning
Kinds of Triangles (Online Interactive)
For this triangles learning exercise, students analyze pictures of four triangles. For each triangle, students mark if it is acute, obtuse, or right.
Curated OER
Circles and Triangles: Sun
In this coloring shape worksheet, students trace the circles and color them yellow. Kids trace the triangles and color them orange. Students then trace the circle and triangle at the bottom of the page.
Curated OER
Shapes and Color: Rectangles and Triangles
In this shape and color instructional activity, students trace rectangles, coloring them pink, then trace circles, coloring them purple. Students then trace and color a set of 6 circles.