All ISEE Upper Level Math Resources
Example Questions
Example Question #1 : How To Find An Angle In Other Quadrilaterals
Three of the interior angles of a quadrilateral measure , , and . What is the measure of the fourth interior angle?
This quadrilateral cannot exist.
The measures of the angles of a quadrilateral have sum . If is the measure of the unknown angle, then:
The angle measures .
Example Question #222 : Geometry
The angles of a quadrilateral measure . Evaluate .
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:
Example Question #1 : How To Find An Angle In Other Quadrilaterals
The four angles of a quadrilateral have the following value: 79 degrees, 100 degrees, 50 degrees, and degrees. What is the value of ?
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:
Example Question #231 : Plane Geometry
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: