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Lesson Plan
Curated OER

Sorting Angles

For Teachers 4th - 7th
In this sorting angles worksheet, students distinguish the differences between right, obtuse and acute angles. Students determine what type of angle thirteen angles are as shown.
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Worksheet
Curated OER

Right Angles

For Students 4th - 5th
In this math worksheet, students compare different shapes while identifying the right angles. They also write down the right angles seen in a classroom.
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Worksheet
Curated OER

Right Angles

For Students 3rd - 4th
In this math worksheet, students learn to recognize a right angle. Students study the picture of the right angle and are asked to draw 3 examples. Students then find and draw 9 examples of right angles in objects around them.
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Lesson Plan
Curated OER

Gougu Rule or Pythagoras' Theorem

For Teachers 5th
Fifth graders explore Pythagoras' Theorem. They examine the pattern linking the length of the hypotenuse of a right angled triangle and the length of the other two sides. Students find an unknown side in right angled triangles.
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Lesson Plan
Curated OER

Hey! What Is Your Angle?

For Teachers 5th
Fifth graders create and classify straight, right, acute and obtuse angles. In this clever lesson, 5th graders utilize pretzel sticks to form different types of angles. Best of all, they get to eat them at the end!
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Worksheet
Curated OER

Classifying Angles: Greater Than, Less Than, or Equal to 90 Degrees?

For Students 2nd - 4th
In this angles worksheet, students analyze four angles. For each angle, students decide if it is greater, less than, or equal to a right angle. Students check the correct box.
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Worksheet
Curated OER

Right Angles

For Students 3rd - 4th
In this right angles instructional activity, students review various images of right angles. Students then find the angles and right angles for the given shapes and write them on the lines.
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Worksheet
Curated OER

Cosine

For Students 10th
In this cosine worksheet, 10th graders solve 10 different problems that include various triangles. They determine the cosine of one point in each triangle illustrated. Then, they apply the line segments given to each and solve for the...
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Worksheet
Curated OER

Right Angles in the Classroom

For Students 2nd - 3rd
In this finding right angles activity, learners look around the classroom and draw any right angles they see. Students then "tick" any right angle in 6 geometric shapes.
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Worksheet
Curated OER

Naming Angles 2

For Students 10th
In this naming angles worksheet, 10th graders complete 12 problems that identify and name various types of angles in figures. They name a pair of vertical angles and a linear pair in 8 of the problems. Then, students name a pair of...
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Worksheet
Curated OER

Cube Count

For Students 6th - 8th
In this cube counting worksheet, students solve 5 word problems that refer to the illustration of a stack of cubes. First, they determine how many cubes would be needed to make four steps, then seven and eight steps. Students also...
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Lesson Plan
Curated OER

Geometry: Classifying Angles

For Teachers 9th - 12th
Students measure, construct, and classify angles as acute, right, straight, and obtuse. Once they have completed an angle worksheet, students use a map of South Carolina to locate cities by constructing the aforementioned angles.
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Lesson Plan
Curated OER

Math: A Geometric Neighborhood

For Teachers 6th - 8th
Students, as a final project, draw a picture of their ideal neighborhood on a sunny day. In addition to the sun, their drawings include homes, trees, streets, and selected objects. Each object in their drawing has a written description...
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Lesson Plan
Curated OER

Investigating the Idea of Cos

For Teachers 5th
Fifth graders use cos to solve problems involving right-angled triangles. They solve equations of the form cos(++) = a, for a between -180 and 360 degrees. They state the value of cos(++) in special cases and graph y = cos(++).
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Lesson Plan
Curated OER

Secrets of Lost Empires I-Colosseum

For Teachers 6th
Sixth graders identify how to use pulleys to change the direction of force. Students develop ways to evaluate designs, noting that no one best design exists and that different tasks require different designs. Students designs will vary.