Geometric measurement: understand concepts of angle and measure angles - 4th Grade Math
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Solve for x.
Solve for x.
The angle is a straight line. A straight line is 
. To find the missing angle we subtract.
The angle is a straight line. A straight line is
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Solve for x.
Solve for x.
To find the value of x we subtract.
To find the value of x we subtract.
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Solve for x.
Solve for x.
To find the value of x we subtract.
To find the value of x we subtract.
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Solve for x.
Solve for x.
To find the value of x we subtract.
To find the value of x we subtract.
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Solve for x.
Solve for x.
To find the value of x we subtract.
To find the value of x we subtract.
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Solve for x.
Solve for x.
To find the value of x we add both of the known angles together.
To find the value of x we add both of the known angles together.
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Find the value of x.
Find the value of x.
When we have an angle with a square symbol in the corner, that means we have a right angle, or a 
angle.
When we have an angle with a square symbol in the corner, that means we have a right angle, or a
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Solve for x.
Solve for x.
To solve for x we subtract.
To solve for x we subtract.
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Solve for x.
Solve for x.
To solve for x we subtract.
To solve for x we subtract.
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Solve for x.
Solve for x.
Because of the square in the corner of the angle we have a 
angle. To find the missing piece of the angle we subtract.
Because of the square in the corner of the angle we have a
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If we wanted to make this angle into a straight line, how many more degrees would we need to add?
If we wanted to make this angle into a straight line, how many more degrees would we need to add?
A straight line has a measurement of 
. We can subtract to find how much more we'd need to have a straight line.
A straight line has a measurement of
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If we wanted to make this angle into a right angle, how many more degrees would we need to add?
If we wanted to make this angle into a right angle, how many more degrees would we need to add?
A right angle has a measurement of 
. To find how much more we would need to add we subtract.
A right angle has a measurement of
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What is an angle that measures less than 
called?
What is an angle that measures less than
By definition, an acute angle is any angle that measures less than 
.
By definition, an acute angle is any angle that measures less than
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Two rays that meet at one point, an endpoint, is called .
Two rays that meet at one point, an endpoint, is called .
By definition, an angle is composed of two rays that meet at a point, called the endpoint.
By definition, an angle is composed of two rays that meet at a point, called the endpoint.
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The image below can be described as a .
The image below can be described as a .
A line segment is a straight line that has a starting point and an ending point.
A line segment is a straight line that has a starting point and an ending point.
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What is an angle that measures more than , but less than 
called?
What is an angle that measures more than
By definition, and obtuse angle is any angle that measure more than 
, but less than 
.
By definition, and obtuse angle is any angle that measure more than
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What is a 
degree angle called?
What is a
By definition, a right angle measures 
.
By definition, a right angle measures
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An angle that measures 
is called .
An angle that measures
By definition, a straight angle measures 
.
By definition, a straight angle measures
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The image below can be described as a .
The image below can be described as a .
By definition, a ray starts at a point and continues in a certain direction, with no endpoint.
By definition, a ray starts at a point and continues in a certain direction, with no endpoint.
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The image below can be described as .
The image below can be described as .
This image is an angle because it shows two rays meeting at an endpoint.
This image is an angle because it shows two rays meeting at an endpoint.
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