Look at the figure below. The area of the parallelogram and the areas of the two congruent triangles formed by a diagonal are related. If you know the area of the parallelogram, how can you find the area of one of the triangles?

The roof of Kamden’s house is shaped like a parallelogram. The base of the roof is 13 m and the area is \(110.5\text{ m}^{2}\). Choose a number and unit to make a true statement.

The height of the roof is _____ __ .

Eliana is drawing a figure on the coordinate grid. For numbers 20a–20d, select True or False for each statement.

20a. The point (−1, 1) would be the fourth vertex of a square.

20b. The point (1, 1) would be the fourth vertex of a trapezoid.

20c. The point (2, -1) would be the fourth vertex of a trapezoid.

20d. The point (−1, -1) would be the fourth vertex of a square.