Calculate the area to be painted in the triangle portion of the barn keeping in mind that there is one triangle on one end of the barn and another triangle on the other end of the barn. He has calculated the area of most of the barn using the formula for a rectangle but the upper portion of the barn forms a triangle shape. He has been asked to put a new coat of paint on a barn. We’ll stick with John the painter for the second question. Make sure to check the video answers to see how you did. Try a couple practice questions for yourself. Here are the formulas for calculating the area of both a square and a rectangle. If you are able to understand the concept then the process involves less memorization. Once again, this goes back to something we talked about before. Maybe even write down some of your thoughts. The next question then becomes HOW do we use these dimensions?īefore you move on to see how it’s done, take a minute to think about it. Not only do they come in handy when we are calculating perimeter, but they also work really well when calculating area. Well as it turns out, those dimensions will work for us. The question becomes this…Ĭan we use those dimensions when calculating the area? Or do we need to somehow come up with other dimensions in order to get to our answer? Once again the portion shaded grey is the area of each of the object. The grey portion represents the area of the object while the black lines surrounding the object represent the perimeter.īefore we begin going through the motions to calculate the area of a square or rectangle lets take a quick visit back to perimeter and more specifically how we defined the dimensions of both a square and a rectangle. The following are some two dimensional shapes shaded in grey. The first thing we should do here is write down the definition of area.Īrea: The amount of space inside the boundary of a flat (2-dimensional) object such as a triangle, square, or circle. A can of paint will be able to cover a certain area and if John can find out the area of the wall then he can figure out how many cans of paint he will need. The answer lies in finding the area of the wall. ![]() How do you think he would go about solving this problem? He knows that the wall is in the shape of a rectangle and that the dimensions are 10 feet high by 27 feet wide. What he needs to know is how much paint he needs to buy for this one particular wall. John is a painter who is going to paint a wall in a house. Whether you have three sides of a triangle given, two sides and an angle or just two angles, this tool is a solution to your geometry problems. Click play on the following audio player to listen along as you read this section. Triangle angle calculator is a safe bet if you want to know how to find the angle of a triangle.
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