EngageNY
Similar Triangles in Circle-Secant (or Circle-Secant-Tangent) Diagrams
First angle measures, now segment lengths. High schoolers first measure segments formed by secants that intersect interior to a circle, secants that intersect exterior to a circle, and a secant and a tangent that intersect exterior to a...
Concord Consortium
Circling Trains
And round and round the park we go! Given a description of an amusement park with the locations of three attractions connected by walkways, learners consider what happens when additional attractions join the mix by doubling the length of...
Curated OER
Triangles and Things
Young learners listen to the story book The Greedy Triangle as the teacher introduces new polygon shapes. They use geometric stencils to trace a quadrilateral, a pentagon, a hexagon, and an octogon onto a foldable notepad. They identify...
Curated OER
Identify Angles
In this angles practice worksheet, students respond to 4 questions that require them to identify the pictured angles as acute, right, or obtuse triangles.
Curated OER
Geometric Shapes
Students identify polygons. In this geometric shape lesson, students explore the characteristics of polygons. They identify polygons, and classify triangles according to their sides and angles. Students create a poster representing...
Curated OER
Triangles Introduction
Students explore geometry by drawing various shapes in class. In this triangle characteristics lesson, students identify the attributes that classify a shape as a triangle and practice using their bodies to create triangles in class....
Curated OER
Triangles, Triangles, Triangles
Students view several different types of triangles. They discuss attributes of a triangle with a partner. Students use a straw cut into pieces to create a triangle. They complete a Triangle Hunt worksheet (teacher created). Students...
Curated OER
Captain Invincible and the Space Shapes
Students identify geometric solids. In this geometric shapes lesson plan, students listen to the teacher read Captain Invincible and the Space Shapes by Stuart J. Murphy. Students then visit a web site where they identify types of...
Curated OER
Identify Angles: Obtuse, Right, Straight and Acute
In this triangle worksheet, learners identify angles as either obtuse, right, straight or acute. A reference web site is given for additional activities.
Curated OER
Shapes and Introduction to Geometry
Students make a quilt. In this geometry lesson, students discuss patchwork quilts and learn some different geometric shapes and patterns that are commonly used. Students explore designs with triangles and squares and then make their own...
Curated OER
Figure Analysis
Students identify the importance of the Principles and Elements of design through self-analysis and sketching clothing appropriate for their body type. They write the actual color name on a line of the included sheet, then describe why...
Curated OER
Measurement
For this measurement worksheet, 7th graders solve 14 various types of problems that include completing a table with the base, height, and/or area of triangles and solving a number of word problems with measurement. They also estimate the...
Mathematics Vision Project
Module 5: Modeling with Geometry
Solids come in many shapes and sizes. Using geometry, scholars create two-dimensional cross-sections of various three-dimensional objects. They develop the lesson further by finding the volume of solids. The module then shifts to finding...
Curated OER
Symmetries of a Quadrilateral I
Learners examine the properties of quadrilaterals from the point of view of rigid motion. Different types of quadrilaterals are characterized by their symmetries, so learners explore the symmetries of a described quadrilateral to...
Charleston School District
Parallel Lines Cut by a Transversal
Pupils study angle measurements between different types of angles associated with parallel lines and transversals. The independent practice asks pupils to identify the types of angles in a diagram and to determine the measure of angles.
Curated OER
Identify Triangles #
In this triangle worksheet, learners identify triangles as scalene, equilateral, right, obtuse, acute or isosceles. A reference web site is given for additional activities.
Curated OER
Identify Triangles #2
In this triangle worksheet, students identify a set of 4 triangles as either equilateral, isosceles or scalene. A reference web site is given for additional activities.
Curated OER
Identify Triangles
In this triangle activity, students identify a set of triangles, labeling as equilateral, scalene or isosceles. A reference web site is given for additional activities.
Curated OER
Identify Triangles #3
In this triangle worksheet, students identify triangles as obtuse, right, or acute, checking the correct answer. A reference web site is given for additional activities.
Curated OER
Identify Triangles
In this triangles worksheet, students identify triangles as either Acute, right or obtuse. A reference web site is given for additional activities.
Curated OER
Identify Triangles #2
In this triangle activity, students identify a set of triangles as either acute, right or obtuse, checking the appropriate box beneath each. A reference web site is given for additional activities.
Curated OER
Identifying Triangles
In this triangle worksheet, students label triangles as acute, right, obtuse, scalene, equilateral or isosceles. A reference web site is given for additional activities.
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
Students investigate the concept of the Pythagorean Theorem. After conducting independent practice to find the hypotenuse of a triangle, they work with the teacher using examples in the lesson plan. The direct instruction is delivered...