## How to Find the Area of a Trapezoid Part 3

This the third part of the series on finding the area of a trapezoid. In the first post, we discussed the derivation of the area of a trapezoid and give a worked example. In the second post, we discussed how to find the area given the base and the height as well as to find the height given the area and the base.

In this post, we are going to find the base, given the height and the area. We continue with the fourth example.

Example 4

A trapezoid has area 65 square centimeters, height 13 cm, and base of 4 cm. Find the other base.

Solution

In this example, we have $A = 65$, $h = 13$ and $a = 4$. We are looking for $b$Continue reading

## One Month Until The Exam! How’s Your Review?

I am not sure if you keep track of your calendar, but today is exactly one month before the next Civil Service Examination. As of this writing, the Official Civil Service Calendar still shows that the exam in on October 26, 2014 and there is no sign of change of schedule so far. This means that you have four weeks to prepare for the exam. Be sure to brush up with your grammar, vocabulary, and mathematics skills. This blog has a lot of reviewer, so all you need to do is read and answer the practice exercises and quizzes.

Aside from the articles about content, here are some tips that might help you more in your review.

In case you have not registered for the upcoming October 2014 exam, I still suggest that you continue your review and continue answering the exercises in this blog. This way, in the next exam which is usually held in April, you will be ready and more confident. I will be writing more exercises and tutorials in this blog, so you might want to subscribe. You can use the Subscribe by Mail box located at the upper right part of the page.

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## How to Find the Area of a Trapezoid Part 2

In the previous post, we have learned the formula for finding the area of a trapezoid. We derived that the formula for the area $A$ of a trapezoid with base $a$ and $b$ (the base are the parallel sides), and height $h$ is $A = \frac{1}{2}h (a + b)$

In this post, we are going to continue with some examples. We will not only find the area of a trapezoid, but other missing dimensions such as base and height. Now, get your paper and pencils and try to solve the problems on your own before reading the solution.

We have already discussed one example in the previous post, so we start with the second example.  Continue reading