Unit 7, Lesson 1
Relationships of Angles
Grade 7
1.1
Warm-up
Visualizing Angles
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Which angle is bigger?
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Identify an obtuse angle in the diagram.
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Which angle is bigger?
Identify an obtuse angle in the diagram.
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If you trace three copies of the hexagon so that one vertex from each hexagon touches the same point, as shown, they fit together without any gaps or overlaps. Use this to figure out the degree measure of the angle inside the hexagon pattern block.
Use pattern blocks to determine the measure of each of these angles.
Tyler and Priya were both measuring angle
Priya thinks the angle measures 40 degrees. Tyler thinks the angle measures 140 degrees. Do you agree with either of them? Explain your reasoning.
When two lines intersect and form four equal angles, we call each one a right angle. A right angle measures
An angle in which the two sides form a straight line is called a straight angle. A straight angle measures
If you put two straight angles together, you get an angle that is
When two angles share a side and a vertex, and they don't overlap, we call them adjacent angles.
Adjacent angles share a side and a vertex.
In this diagram, angle
A right angle is half of a straight angle. It measures 90 degrees.
A straight angle is an angle that forms a straight line. It measures 180 degrees.