Worksheet
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Measuring Angles

For Students 5th - 6th
In this measuring angles worksheet, students solve 10 problems in which angles are measured with a protractor and labeled with: acute, obtuse, right.
Lesson Plan
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Angle Action

For Teachers 5th - 7th
Students measure and label specified angles. In this angles lesson, students use a protractor to find angles that are acute, obtuse, and reflexive. Students then label each angle and match the angles the correct definition. This lesson...
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Constructions and Angles

For Students 6th - 10th
In this triangle constructing and classifying learning exercise, learners read through a tutorial on triangles and angles. Then, students complete 17 exercises in which they answer questions about angles and triangles. By clicking on the...
Lesson Plan
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Polygons and Angles

For Teachers 6th
Sixth graders estimate the measurement of angles and then measure the exact distance using an angle ruler. In groups, they explore shapes and recognize the characteristics acute, obtuse and right angles. Students sketch required shapes,...
Lesson Plan
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Toothpick Triangles

For Teachers 4th - 8th
Students draw a chart (included in the lesson plan) to use with their investigation. They review terminology of triangles and receive toothpicks to use in the lesson plan. Beginning with three toothpicks, students form a triangle. They...
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Identify Angles: Obtuse, Right, Straight and Acute

For Students 5th - 6th
In this triangle worksheet, students identify angles as either obtuse, right, straight or acute. A reference web site is given for additional activities.
Lesson Plan
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Angle Land and Angle Aerobics

For Teachers 6th
Sixth graders investigate different types of angles. In this geometry activity, 6th graders use a protractor to identify acute, obtuse, and straight angles.
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Measuring, Drawing, and Naming Angles

For Students 6th - 10th
In this angles worksheet, students name and measure six angles.  Students then draw four angles with a protractor given the degree measure.
Lesson Plan
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What is my Angle? App

For Teachers 6th - 12th Standards
Learners estimate angle measures in this this estimating angle measures lesson. They use an application on their graphing calculator that shows various settings involving angles and then they estimate the angle measure of a clock's...
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Identify Triangles: Acute, Right, Obtuse, Straight

For Students 5th - 6th
In this triangles learning exercise, learners draw angles with given measurements and identify each as either acute, right, obtuse or straight. A reference web site is given for additional activities. 
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Angles measure and classify

For Students 5th - 8th
In this angles worksheet, students measure angles with a protractor and figure out if it is acute, right, obtuse, or straight. Students complete 6 problems.
Lesson Plan
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Classify and Measure the Angles

For Teachers 5th - 7th
In this measuring angles worksheet, students use protractors to measure 9 angles and classify them as obtuse, straight, acute or right angles.
Worksheet
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Describe Five Polygons

For Students 6th - 9th
In this polygons worksheet, students use the parallel, acute, right, obtuse, straight, and reflex to describe the five shapes provided.
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Identifying Triangles

For Students 5th - 7th
In this triangles practice learning exercise, students respond to 4 questions that require them to identify the pictured triangles as acute, right, or obtuse triangles.
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Angle Comparison to Right Angles

For Students 5th - 6th
In this angles learning exercise, students solve 4 problems in which an angle is analyzed and measured. Students tell if each angle is greater than, less than or equal to a right angle.
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Learning About Triangles

For Students 4th - 6th
Upper graders label four triangles and fill in the labels correctly. They draw three original triangles and answer the questions about them.
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Measuring Angles

For Teachers 6th - 8th Standards
Middle schoolers explore angle measure as they estimate angle measure and measure and draw angles of less than 360 degrees. The lesson emphasizes the use of estimation when measuring angles.
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Classify Triangles

For Students 4th - 7th
Here is a classifying triangles practice worksheet in which learners sharpen their problem solving skills as they solve six story problems.
Worksheet
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Identify Angles: Acute, Right, Obtuse and Straight

For Students 5th - 6th
In this angles activity, learners identify a set of angles as either acute, right, obtuse or straight. A reference web site is given for additional activities.
Lesson Plan
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Angles in Art

For Teachers 5th - 9th
Students utilize their handheld and the Angles program to create a non-objective artwork. Images created by famous artists who have utilized angles in their art work are examined.
Worksheet
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Classifying Triangles

For Students 6th
In this classifying triangles worksheet, 6th graders write the type of triangle, acute, right or obtuse, for 9 pictures of triangles, answers included.
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Independent Practice 2: Triangles

For Students 6th - 8th
In this triangle worksheet, students identify given triangles according to their sides and angles. Afterward, students draw triangles to match given descriptions. This one-page worksheet contains 15 problems.
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Angle Measures

For Students 5th - 6th
In this angles worksheet, students solve 20 problems pertaining to angle measurement and classification. This page is intended to be an online activity, but can be completed on paper.
Worksheet
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Classify Angles Worksheet

For Students 5th - 6th
In this angle classification worksheet, students solve 8 problems in which an angle measurement in degrees is analyzed. Students classify each angle as right, obtuse, or acute.

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