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Exemplo 9.27 de Prealgebra, 9.4 Use Properties of Rectangles, Triangles, and Trapezoids
Use Properties of Rectangles, Triangles, and Trapezoids: exemplo 9.27
Problema e solução em inglês, como no livro original.
The length of a rectangle is meters and the width is meters. Find ⓐ the perimeter, and ⓑ the area.
Resolva no papel primeiro. Depois abra a solução um passo de cada vez e pare assim que conseguir terminar sozinho.
Solução
ⓐ Step 1. Read the problem. Draw the figure and label it with the given information. Step 2. Identify what you are looking for. the perimeter of a rectangle Step 3. Name. Choose a variable to represent it. Let P = the perimeter Step 4. Translate.
Write the appropriate formula.
Substitute.Step 5. Solve the equation. Step 6. Check: Step 7. Answer the question. The perimeter of the rectangle is 104 meters. ⓑ Step 1. Read the problem. Draw the figure and label it with the given information. Step 2. Identify what you are looking for. the area of a rectangle Step 3. Name. Choose a variable to represent it. Let A = the area Step 4. Translate.
Write the appropriate formula.
Substitute.Step 5. Solve the equation. Step 6. Check: Step 7. Answer the question. The area of the rectangle is 60 square meters.
Sua vez
O Try It do livro logo depois deste exemplo: mesma ideia, outros números. Só a resposta é dada.
The length of a rectangle is yards and the width is yards. Find ⓐ the perimeter and ⓑ the area.
Como foi?