Use the image to answer the question Amaurty draws an acute triangle on the coordinate grid. He finds the area of the triangle by drawing a rectangle that circumscribes the triangle and forming right triangles. How can Amaury find the area of the triangle? What is the area of the triangle in square units?

1 answer

To find the area of an acute triangle using a circumscribed rectangle, Amaurty can follow these steps:

  1. Determine the Vertices: Identify the coordinates of the triangle's vertices on the coordinate grid.

  2. Draw a Circumscribing Rectangle: Draw a rectangle that completely encompasses the triangle. The rectangle's sides will align with the axes of the coordinate grid, with its corners being the extreme points of the triangle.

  3. Calculate the Area of the Rectangle: Measure the length and width of the rectangle. The area can be found using the formula: \[ \text{Area}_{\text{rectangle}} = \text{length} \times \text{width} \]

  4. Identify the Area of Right Triangles: Form right triangles by drawing lines from the triangle's vertices to the rectangle's edges. The area of these right triangles can be calculated using the formula: \[ \text{Area}_{\text{right triangle}} = \frac{1}{2} \times \text{base} \times \text{height} \]

  5. Subtract the Areas of the Right Triangles from the Rectangle: If there are multiple right triangles formed outside of the triangle, calculate their total area and subtract it from the area of the rectangle to find the area of the triangle: \[ \text{Area}{\triangle} = \text{Area}{\text{rectangle}} - \text{Area}_{\text{right triangles}} \]

Finding the Area in Square Units

Without the coordinates or further details of the triangle's dimensions, I can't provide a specific numeric value for the area. If you can supply the vertices of the acute triangle or the dimensions of the rectangle, I can help you calculate the exact area. Alternatively, if you have specific values from your image or problem context, feel free to share them!