+
Lesson Plan
Curated OER

Testing For Congruent Triangles

For Teachers 9th - 12th
Students 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.
+
Lesson Plan
Curated OER

Triangles

For Teachers 3rd
Third graders recognize geometric shapes with acute angles, make geometric shapes with acute angles on geoboards, and draw acute angles on geopaper.
+
Lesson Plan
Curated OER

Similar and Congruent Triangles

For Teachers 2nd - 4th
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.
+
Lesson Plan
Curated OER

How Tall Is That Flag Pole?

For Teachers 6th - 8th
Middle schoolers 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.
+
Lesson Plan
Curated OER

Pythagorean Theorem

For Teachers All
Students explore how the Pythagorean Theorem works and how to apply it.
+
Worksheet
Curated OER

Parallel Lines and Triangles

For Students 9th - 12th
In this triangles activity, students solve 1 problem of multiple variables within a single picture of various triangles intersecting with a pair of parallel lines.
+
Worksheet
Curated OER

Triangle Review

For Students 4th - 6th
In this triangle activity, 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.
+
Lesson Plan
Curated OER

Rectangles and Squares

For Teachers K - 1st
Students identify two dimensional shapes in the school environment. In this basic shapes lesson, students watch a video about rectangles and squares. Students find examples shapes in their classroom and draw them. Students present their...
+
Worksheet
Curated OER

Equilateral Triangles

For Students 1st - 2nd
In this equilateral triangles worksheet, students study the various triangles to identify equilateral triangles. Students may count the triangles.
+
Lesson Plan
Alabama Learning Exchange

Is It a Triangle?

For Teachers 9th - 12th Standards
Learners explore the concept of triangle inequalities.  In this triangle inequality lesson, students cut spaghetti noodles into given lengths.  Learners use the noodles to complete a worksheet about triangle inequalities.  Students...
+
Worksheet
Curated OER

Circus of Shapes

For Students K - 2nd
In this geometric shapes worksheet, students analyze a picture of a skyscraper tower with many shapes. Students color all the triangles.
+
Worksheet
Curated OER

Circles and Triangles: Sun

For Students K - 1st
In this coloring shape worksheet, students trace the circles and color them yellow. Students trace the triangles and color them orange. Students then trace the circle and triangle at the bottom of the page.
+
Worksheet
Curated OER

Shapes and Color: Rectangles and Triangles

For Students Pre-K - 1st
In this shape and color worksheet, students trace rectangles, coloring them pink, then trace circles, coloring them purple. Students then trace and color a set of 6 circles.
+
Worksheet
Curated OER

Shapes and Colors: Triangles and Ovals

For Students Pre-K - 1st
In this shape and color worksheet, students trace triangles coloring them brown, then trace ovals and color them pink. Students also trace and pictures of a ice cream cones made of triangles and ovals.
+
Worksheet
Curated OER

Tracy Triangle

For Students 1st
In this triangle worksheet, 1st graders study the picture of the triangle and then memorize the triangle song. Students practice drawing triangles in the provided space.
+
Worksheet
Curated OER

Perimeter and Area of Triangles 2

For Students 5th
For this measurement worksheet, 5th graders study the different triangles and then use the given measurements to find the perimeter and area for each.
+
Worksheet
Curated OER

Calculating the Perimeter of a Triangle

For Students 5th
In this geometry learning exercise, 5th graders read how to find the perimeter of a triangle. They use the P= S1+S2+S3 formula to find the perimeter of three triangles.
+
Worksheet
Curated OER

Shapes Matching Worksheet

For Students Pre-K - K
Using this worksheet, students practice identifying basic shapes, such as an oval, rectangle, triangle, and hexagon. This worksheet would be ideal for preschool or kindergarten students.
+
Worksheet
Curated OER

Creating Tessellations

For Students 10th
In this creating tessellations worksheet, 10th graders solve 2 word problems that include creating various tessellations. First, they explore the various techniques used to form tessellations, including triangles, quadrilaterals,...
+
Worksheet
Curated OER

Brain Teaser- How Many Triangles?

For Students 4th - 5th
In this geometry learning exercise, students examine a picture that has many hidden triangles. Students count the triangles they discover and color the picture.
+
Lesson Plan
Curated OER

Proposed Problems

For Teachers 11th - Higher Ed
In this math worksheet, students read the information about an isosceles triangle. The ratio of the lengths of two sides is equal. They determine the exact measures of its angles.
+
Lesson Plan
Curated OER

Power Question 2

For Teachers 9th - 12th
In this math worksheet, students determine the locus of points, M, in plane ABC, such that KMAB=KMAC. They also draw the triangle ABC. Then determine the proof of the interior angles determining the identity of the equilateral triangle.
+
Worksheet
Curated OER

Puzzling Shapes

For Students 2nd - 3rd
In this math worksheet, students count the number of rectangles and triangles they see in two drawings. Each figure has overlapping shapes.
+
Worksheet
Curated OER

Types of Triangles

For Students 4th - 5th
For this math worksheet, students classify the listed triangles and practice labeling them correctly. The definition of each type is necessary prerequisite knowledge.