Classifying Angles

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Grade 7: The Learning Equation Math

32.01 Classifying Angles

3icon.gif (4368 bytes)

3D Objects & 2D Shapes

Refresher pp 62-63

Learning Outcomes:

The student will:

measure and classify pairs of angles complimentary or supplementary angles.

Supplementary Angles

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Source: Supplementary Angles

Complimentary Angles

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Source: Complementary Angles

Supplementary Angles

A-E

F-J

K-O

P-R

S-Z

angle, complementary, supplementary, acute, adjacent, circumference, obtuse, quadrilateral, vertex

Prerequisite Skills:

Recognize angles as being more than 90 degrees(obtuse), equal to 90 degrees(right), less than 90 degrees(acute), equal to 180 degrees(straight), greater than 180 degrees(reflex).

Type in the size of the angle you want to create:

Source: Angle Applet

Acute and Obtuse Angles

Source of Applet: Acute and Obtuse Angles

Estimate and measure angles using a circular protractor.

There are two scales on a protractor. Use the scale that measures the distance between the two arms (rays) of the angle. The arms(rays) in this example are blue (CCW) and red (CW). Use the radio buttons to switch between the two scales.

angleshapes - cool

angle360 - cool

Angles on a Straight Line - cool

Sketch and draw an angle when the degree sign is specified.

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