How to find an angle in other quadrilaterals - ISEE Upper Level Mathematics Achievement
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Three of the interior angles of a quadrilateral measure 
, 
, and 
. What is the measure of the fourth interior angle?
Three of the interior angles of a quadrilateral measure
The measures of the angles of a quadrilateral have sum 
. If 
is the measure of the unknown angle, then:
The angle measures 
.
The measures of the angles of a quadrilateral have sum
The angle measures
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The angles of a quadrilateral measure 
. Evaluate 
.
The angles of a quadrilateral measure
The sum of the degree measures of the angles of a quadrilateral is 360, so we can set up and solve for 
in the equation:
The sum of the degree measures of the angles of a quadrilateral is 360, so we can set up and solve for
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The four angles of a quadrilateral have the following value: 79 degrees, 100 degrees, 50 degrees, and 
degrees. What is the value of 
?
The four angles of a quadrilateral have the following value: 79 degrees, 100 degrees, 50 degrees, and
Given that there are 360 degrees when all the angles of a quadrilateral are added toghether, this problem can be solved with the following equation:
Given that there are 360 degrees when all the angles of a quadrilateral are added toghether, this problem can be solved with the following equation:
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In a quadrilateral, the angles have the following values:
.
What is the value of 
?
In a quadrilateral, the angles have the following values:
What is the value of
Given that there are 360 degrees when the angles of a quadrilateral are added together, it follows that:
Given that there are 360 degrees when the angles of a quadrilateral are added together, it follows that:
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