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Worksheet
Curated OER

Lines and Angles

For Students 6th - 8th
In this lines and angles activity, learners identify parallel and perpendicular lines. They demonstrate the characteristics of a straight line. They determine missing angle measurements. This two-page activity contains 3 multi-step...
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Lesson Plan
Beacon Learning Center

Angles and Algebra

For Teachers 6th - 8th
Young scholars calculate angle measure for triangles and complementary/supplementary angles. After a lecture/demo, students utilize a worksheet imbedded in this plan to gain practice.
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Worksheet
Curated OER

Forty Mental Math Angle Problems

For Students 10th - 11th
In this angle worksheet, learners answer forty mental math questions divided into four problem sets.  These problems require students to remember angle facts and so simple calculations mentally.
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Worksheet
Curated OER

Angles

For Students 5th - 8th
In this angles worksheet, students answer multiple choice questions about different types of angles and measurements of angles. Students complete 6 questions total.
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Interactive
Curated OER

Try These Angles! Exploring Angles

For Students 5th - 8th
In this angles worksheet, students answer multiple choice questions about different types of angles in shapes. Students complete 10 questions.
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Lesson Plan
Curated OER

Exterior and Interior Angles of Triangles

For Teachers 10th
Tenth graders explore the exterior and interior angles of triangles. They use a theorem in order to prove a theorem about all polygons. Students use the theorem and its applications to find the angles of different types of triangles.
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Lesson Plan
Curated OER

Polygons

For Teachers 5th - 7th
Young scholars investigate the concepts related to the study of polygons. They specifically look at how angles is related. The lesson includes specific examples and dialogue to be used by the teacher during direct instruction and...
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Lesson Plan
Curated OER

Study Buddies: Classifying Triangles

For Teachers 4th - 5th
In this math worksheet, students analyze an informative chart about the measurement and angles of equilateral, isosceles and scalene triangles. Students then answer 5 questions about classifying triangles.
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App
Carstens Studios

Math Doodles

For Students 2nd - 9th Standards
Discover the joy and excitement of improving your math fluency through four different puzzles. Combine those with 25 different ways to represent numbers and you have hours of enjoyment that can be fun outside of the classroom as well.
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Worksheet
Curated OER

Math Lab

For Students 10th
In this polygons and angles learning exercise, 10th graders complete 5 different questions related to polygons and angles, in addition to symmetry and transformations. First, they define polygon and how they are named. Then, students...
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Unit Plan
Mathematics Vision Project

Geometric Figures

For Teachers 10th - 12th Standards
Logical thinking is at the forefront of this jam-packed lesson, with young mathematicians not only investigating geometric concepts but also how they "know what they know". Through each activity and worksheet, learners wrestle with...
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Interactive
Curated OER

Angles in a Triangle

For Students 10th
In this geometry learning exercise, 10th graders determine the measure or measures of the missing angle(s) in a triangle. The one page interactive learning exercise contains four questions. Answers and hints are included. 
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Worksheet
Curated OER

Polygons

For Students 6th - 10th
In this polygons learning exercise, students read about and complete many activities involving triangles, angles, and symmetry. Students complete 17 pages of activities.
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Worksheet
Math Mammoth

Triangles 1

For Students 5th - 9th
In this triangles learning exercise, students measure and calculate the measurements of eight triangles, their sums and classify the triangles as acute, obtuse or right.
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Worksheet
Curated OER

Sums of Angles in Polygons

For Students 5th - 6th
In this angles in polygons worksheet, students calculate the sum of internal angles in 2 polygons, and solve for x in an additional 2. A reference web site is given for additional activities.
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Unit Plan
Mathematics Vision Project

Module 3: Geometric Figures

For Teachers 9th - 12th Standards
It's just not enough to know that something is true. Part of a MVP Geometry unit teaches young mathematicians how to write flow proofs and two-column proofs for conjectures involving lines, angles, and triangles.
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Lesson Plan
Curated OER

Sum of Interior/Exterior Angles with Wilbur

For Teachers 7th - 10th
Students identify the interior and exterior measures of polygons. In this geometry lesson, students identify the formula for interior angles of polygons. They differentiate between triangular and polygons angles.
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Lesson Plan
Curated OER

Patterns in the Sums of Polygon Angles

For Teachers 6th
Sixth graders discover the patterns of sums of polygon angles. In this math lesson, 6th graders study the properties of geometric shapes to solve problems as they participate in hands-on activities.
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Worksheet
Curated OER

Exterior Angles

For Students 10th
In this exterior angles worksheet, 10th graders solve and measure 10 different angles and figures related to exterior angles. First, they determine how many degrees there are in the sum of the exterior angles of a regular heptagon. Then,...
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Lesson Plan
Curated OER

Interior and Exterior Angles of Polygons

For Teachers 9th - 10th
Young scholars identify interior and exterior angles of polygons. In this geometry lesson, students add interior and exterior angles of polygons. They use angle theorems to solve the problems.
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Lesson Plan
Curated OER

Polygon Sum Conjecture

For Teachers 9th - 10th
Students calculate the sum of the angles of a polygon. For this geometry lesson, students use the interior angle formula of polygon based on the number of sides of the polygon. They identify the missing angle using algebra.
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Lesson Plan
Curated OER

Twenty-Five Measures of the Angles of a Triangle Problems

For Teachers 9th - 10th
For this triangle worksheet, students calculate the measures of the angles or the sums of the measures of the angles in twenty-five triangle problems and hands-on activities.  The solutions are provided.
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Lesson Plan
Curated OER

Around The Stop Sign

For Teachers 6th - 12th
Students analyze a drawing of a regular octagon inscribed in a circle to determine angle measures, using knowledge of properties of regular polygons and the sums of angles in various polygons to help solve the problem. They use...
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Lesson Plan
Curated OER

Exploring Characteristics of Triangles

For Teachers 9th - 11th
Young scholars draw triangles and explore the classification of each using the measures of interior angles and lengths of sides. They investigate the sum of the interior angles of various triangles and conjecture and prove the theorem:...

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