Advanced Geometry : Advanced Geometry

Study concepts, example questions & explanations for Advanced Geometry

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Example Questions

Example Question #1 : Graphing

Solve and graph the following inequality:

Possible Answers:

Correct answer:

Explanation:

To solve the inequality, the first step is to add  to both sides:

 

The second step is to divide both sides by :

To graph the inequality, you draw a straight number line. Fill in the numbers from  to infinity. Infinity can be designated by a ray. Be sure to fill in the number , since the equation indicated greater than OR equal to.

The graph should look like:

Number_line

Example Question #201 : Coordinate Geometry

Points  and  lie on a circle. Which of the following could be the equation of that circle?

Possible Answers:

Correct answer:

Explanation:

If we plug the points  and  into each equation, we find that these points work only in the equation . This circle has a radius of  and is centered at .

Example Question #1 : Graphing

Which of the following lines is perpendicular to the line ?

Possible Answers:

Correct answer:

Explanation:

The key here is to look for the line whose slope is the negative reciprocal of the original slope.

In this case,  is the negative reciprocal of .

Therefore, the equation of the line which is perpendicular to the original equation is:

Example Question #1 : How To Graph A Two Step Inequality

Which inequality does this graph represent?

Inequality a

Possible Answers:

;

;

;

Correct answer:

;

Explanation:

The two lines represented are and . The shaded region is below both lines but above 

Example Question #1 : How To Graph A Two Step Inequality

What is the area of the shaded region for the following inequality:

;

Possible Answers:

Correct answer:

Explanation:

This inequality will produce the following graph:

Inequality a

The shaded area is a triangle with base 7 and height 2.

To find the area, plug these values into the area formula for a triangle, .

In this case, we are evaluating , which equals 7.

Example Question #291 : Advanced Geometry

What is the area of the shaded region for this system of inequalities:

;

Possible Answers:

Correct answer:

Explanation:

Once graphed, the inequality will look like this:

Inequality b

To find the area, it is easiest to consider it as 2 congruent triangles with base 6 and height 3.

The total area will then be

, or just .

Example Question #1 : How To Graph A Two Step Inequality

Find the -intercept for the following:

Possible Answers:

Correct answer:

Explanation:

 

.

.

.

Example Question #201 : Graphing

Let D be the region on the (x,y) coordinate plane that contains the solutions to the following inequalities:

, where  is a positive constant

Which of the following expressions, in terms of , is equivalent to the area of D?

Possible Answers:

Correct answer:

Explanation:

  Inequality_region1

Example Question #1 : Kites

Screen_shot_2015-03-06_at_6.20.29_pm

The area of the rectangle is , what is the area of the kite?

Possible Answers:

Correct answer:

Explanation:

The area of a kite is half the product of the diagonals.

The diagonals of the kite are the height and width of the rectangle it is superimposed in, and we know that because the area of a rectangle is base times height.

Therefore our equation becomes:

.

We also know the area of the rectangle is . Substituting this value in we get the following:

Thus,, the area of the kite is .

Example Question #1 : Kites

Given: Quadrilateral  such that   is a right angle, and diagonal  has length 24.

Give the length of diagonal .

Possible Answers:

None of the other responses is correct.

Correct answer:

Explanation:

The Quadrilateral  is shown below with its diagonals  and .

. We call the point of intersection :

Kite

The diagonals of a quadrilateral with two pairs of adjacent congruent sides - a kite - are perpendicular; also,  bisects the  and angles of the kite. Consequently,  is a 30-60-90 triangle and  is a 45-45-90 triangle. Also, the diagonal that connects the common vertices of the pairs of adjacent sides bisects the other diagonal, making  the midpoint of . Therefore, 

.

By the 30-60-90 Theorem, since  and  are the short and long legs of 

By the 45-45-90 Theorem, since  and  are the legs of a 45-45-90 Theorem, 

.

The diagonal  has length 

.

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