Intermediate Geometry : Quadrilaterals

Study concepts, example questions & explanations for Intermediate Geometry

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Example Questions

Example Question #4 : How To Find An Angle In A Parallelogram

Custom_vt_rhomb_3

Using the above rhombus, find the sum of angle  and angle 

Possible Answers:

Correct answer:

Explanation:

A rhombus must have equivalent opposite interior angles. Additionally, the sum of all four interior angles must equal  degrees. And, the adjacent interior angles must be supplementary angles (sum of  degrees).


Thus, the solution is:





Example Question #1 : How To Find An Angle In A Parallelogram

Vt_rhomb_4

Given that the measurement of angle  degrees, find the sum of angle  and angle 

Possible Answers:

Correct answer:

Explanation:

A rhombus must have equivalent opposite interior angles. Additionally, the sum of all four interior angles must equal  degrees. And, the adjacent interior angles must be supplementary angles (sum of  degrees)--i.e. angles  degrees. 

The solution to this problem is: 

 

 



 

Therefore, 

Example Question #6 : How To Find An Angle In A Parallelogram

Custom_vt_rhomb_3

Using the above rhombus, find the measurement of angle 

Possible Answers:

Correct answer:

Explanation:

A rhombus must have equivalent opposite interior angles. Additionally, the sum of all four interior angles must equal  degrees. And, the adjacent interior angles must be supplementary angles (sum of  degrees). 


Thus, the solution is:

  
 


Example Question #1 : How To Find An Angle In A Parallelogram

Vt_rhomb_4

In the above rhombus, angle  has a measurement of  degrees. Find the sum of angles  and 

Possible Answers:

Correct answer:

Explanation:

A rhombus must have equivalent opposite interior angles. Additionally, the sum of all four interior angles must equal  degrees. And, the adjacent interior angles must be supplementary angles (sum of  degrees)--i.e. angles  degrees. 

The solution to this problem is: 

 

 

Thus, 

Example Question #8 : How To Find An Angle In A Parallelogram

Vt_parallelogram_5

Using the parallelogram above, find the measurement of angle 

Possible Answers:

Correct answer:

Explanation:

A parallelogram must have equivalent opposite interior angles. Additionally, the sum of all four interior angles must equal  degrees. And, the adjacent interior angles must be supplementary angles (sum of  degrees).

Since, angle  and  are supplementary the solution is:

Example Question #1 : How To Find An Angle In A Parallelogram

Vt_parallelogram_5

Using the parallelogram above, find the sum of angles  and .

Possible Answers:

Correct answer:

Explanation:

A rhombus must have equivalent opposite interior angles. Additionally, the sum of all four interior angles must equal  degrees. And, the adjacent interior angles must be supplementary angles (sum of  degrees). 

The first step to solving this problem is to find the measurement of angle . Since angle  is a supplementary angle to angle , angle 

 

Since, angle  and  are opposite interior angles they must be equivalent. 

Thus, the final solution is:

Example Question #1 : How To Find An Angle In A Parallelogram

Vt_parallelogram_5

Using the parallelogram above, find the sum of angles  and 

Possible Answers:

Correct answer:

Explanation:

A parallelogram must have equivalent opposite interior angles. Additionally, the sum of all four interior angles must equal  degrees. And, the adjacent interior angles must be supplementary angles (sum of  degrees). 

Since, angles  and  are opposite interior angles, they must be equivalent. 

Therefore, the solution is: 

Example Question #11 : How To Find An Angle In A Parallelogram

Parallelogram_7

In the parallelogram shown above, angle  is  degrees. Find the measure of angle 

Possible Answers:

Correct answer:

Explanation:

A parallelogram must have equivalent opposite interior angles. Additionally, the sum of all four interior angles must equal  degrees. And, the adjacent interior angles must be supplementary angles (sum of  degrees). 

Since, angles  and  are opposite interior angles, thus they must be equivalent. 

, therefore 

Example Question #11 : How To Find An Angle In A Parallelogram

Parallelogram_7

In the parallelogram shown above, angle  is  degrees. Find the sum of angles  and 

Possible Answers:

Correct answer:

Explanation:

A parallelogram must have equivalent opposite interior angles. Additionally, the sum of all four interior angles must equal  degrees. And, the adjacent interior angles must be supplementary angles (sum of  degrees).


Thus, the solution is:



Since both angles  and  equal  There sum must equal 

Example Question #13 : How To Find An Angle In A Parallelogram

Parallelogram_7

Using the parallelogram above, find the sum of angles  and  

Possible Answers:

Not enough information is provided to find an answer. 

Correct answer:

Explanation:

A parallelogram must have equivalent opposite interior angles. Additionally, the sum of all four interior angles must equal  degrees.

Also, the adjacent interior angles must be supplementary angles (sum of  degrees).

Since, angles  and  are adjacent to each other they must be supplementary angles.

Thus, the sum of these two angles must equal  degrees. 

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