IM 6.1.9 Practice: Formula for the Area of a Triangle

Select all drawings in which a corresponding height for a given base is correctly identified.

How is the area related to the base and its corresponding height?

Here is a right triangle. Which of the following would be a corresponding height if we consider d, as the base.

Here is a right triangle. Which of the following would be a corresponding height if we consider e, as the base.

Here is a right triangle. Which of the following would be a corresponding height if we consider f, as the base.

Andre drew a line connecting two opposite corners of a parallelogram. Select all true statements about the triangles created by the line Andre drew.

Here is an octagon. (Note: The diagonal sides of the octagon are not 4 inches long.) While estimating the area of the octagon, Lin reasoned that it must be less than 100 square inches. Do you agree? Explain your reasoning.