Area of Triangles and Parallelograms Answers

On a coordinate plane, triangle G H J has points (1, 1), (4, 1), (4, 5).

A hole the size of a photograph is cut from a red piece of paper to use in a picture frame.

On a coordinate plane, triangle L M N has points (1, negative 1), (3, 2), and (1, 3). An altitude is drawn from point M to point P on side N L.

On a coordinate plane, triangle A B C has points (1, 1), (4, 0), (3, 5).

Michael is finding the area of parallelogram ABCD. To do this, he follows the steps in the table. Step 1 Draw a rectangle around parallelogram ABCD.Step 2Find the area of the rectangle.Step 3Find the area of the four right triangles created in the corners of the rectangle.Step 4Subtract the area of the right triangles from the area of the rectangle.

For a project, Carlos must provide one cut-out paper model of each type of triangle: acute, right, and obtuse. He sketches each triangle on graph paper before making the models.

On a coordinate plane, parallelogram A B C D is shown. Point A is at (1, 3), point B is at (8, 8), point C is at (12, 5), and point D is at (5, 0).

On a coordinate plane, triangle Q R S has points (negative 1, 2), (1, negative 4), (negative 2, negative 2).

On a coordinate plane, parallelogram A B C D has points (negative 3, 5), (1, 5), (5, 0), and (1, 0).

On a coordinate plane, triangle A B C is shown. Point A is at (0, 0), point B is at (3, 4), and point C is at (3, 2).