Adiagonal of a parallelogram is 20 inches long and makes angles of 17° and 49° with the sides. how long is the longest side?

1. what is the measure of ∠abc? what is the measure of ∠abd?

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Write an equation for the function that includes the points (2,100)and (3,100)