Display an introductory message: this program calculates the area of a triangle use the getdouble function to get the lengths (between 1 and 100) of the three sides from the user. this will require three calls to getdouble. use the calcarea function to get the area of the triangle. if calcarea returns a negative value for the area, then that indicates the triangle is invalid. if the triangle is invalid, then display an error message; otherwise display the area with one digit after the decimal point.

When creating a presentation in libre office impress, where does the editing of slides take place? a. the slides panel b. the center panel c. the tasks panel, under the masters pages tab d. the tasks panel, under the layouts tab

Write the command that can be used to answer the following questions. (hint: try each out on the system to check your results.) a. find all files on the system that have the word test" as part of their filename. b. search the path variable for the pathname to the awk command. c. find all files in the /usr directory and subdirectories that are larger than 50 kilobytes in size. d. find all files in the /usr directory and subdirectories that are less than 70 kilobytes in size. e. find all files in the / directory and subdirectories that are symbolic links. f. find all files in the /var directory and subdirectories that were accessed less than 60 minutes ago. g. find all files in the /var directory and subdirectories that were accessed less than six days ago. h. find all files in the /home directory and subdirectories that are empty. i. find all files in the /etc directory and subdirectories that are owned by the group bin."

What are the 12 colors of the spectrum called?