GED Math : 2-Dimensional Geometry
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Example Questions
Example Question #391 : 2 Dimensional Geometry
If the rectangle has a width of 5 and a length of 10, what is the area of the rectangle?
Write the area for a rectangle.
Substitute the given dimensions.
The answer is:
Example Question #2 : Angles And Quadrilaterals
In the figure below, find the measure of the largest angle.
Recall that in a quadrilateral, the interior angles must add up to 
Thus, we can solve for 
Now, to find the largest angle, plug in the value of 
The largest angle is 
Example Question #1 : Perimeter And Sides
Identify the above polygon.
Octagon
Quadrilateral
Hexagon
Pentagon
Octagon
A polygon with eight sides is called an octagon.
Example Question #392 : 2 Dimensional Geometry
Refer to the above figure.
Which of the following is not a valid alternative name for Polygon 
Polygon
Polygon
Polygon
Polygon
Polygon
In naming a polygon, the vertices must be written in the order in which they are positioned, going either clockwise or counterclockwise. Of the four choices, only Polygon 
Example Question #393 : 2 Dimensional Geometry
Refer to the above figure. All angles shown are right angles.
What is the perimeter of the figure?
The figure can be viewed as the composite of rectangles. As such, we can take advantage of the fact that opposite sides of a rectangle have the same length, as follows:
Now that the missing sidelengths are known, we can add the sidelengths to find the perimeter:
Example Question #394 : 2 Dimensional Geometry
Refer to the above figure.
Which of the following segments is a diagonal of Pentagon 
A diagonal of a polygon is a segment whose endpoints are nonconsecutive vertices of the polygon. Of the four choices, only 
Example Question #3 : Other Shapes
Classify the above polygon.
Octagon
Hexagon
Pentagon
Rhombus
Octagon
A polygon with eight sides is called an octagon.
Example Question #395 : 2 Dimensional Geometry
Classify the above polygon.
Trapezoid
Pentagon
Hexagon
Octagon
Hexagon
A polygon with six sides is called a hexagon.
Example Question #396 : 2 Dimensional Geometry
Hexagon 
I) Rectangle
II) Rhombus
III) Square
IV) Trapezoid
II only
IV only
I only
I, II, and III only
I only
The figure described is below.
Since the hexagon is regular, its sides are congruent, and its angles each have measure 
Also, each of the triangles are isosceles, and their acute angles measure 
The correct response is I only.
Example Question #397 : 2 Dimensional Geometry
The above figure is a regular octagon. Give its perimeter in yards.
A regular octagon has eight sides of equal length, so multiply the length of one side by eight:
Divide by three to get the equivalent in yards:
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