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.

just dont use the app.its not a good one,consumes a lot of ur head without any benefits

we can all learn from our past mistakes because we all have different ways of learning different types of techniques. my way may or may not another classmate remember and have the repetition to acknowledge such standard. such as remembering acronyms. using abbreviations to us remember keep things in order in our memory. this us figure out what comes next in the sequence. if so, what we have is a sentence of just letters all in caps. we either know the meaning or have no idea what it stands for. most of the time we know the meaning and context. but most of us who don't know, should learn by having a quick glance at what needs to be remembered. such as repetition in the memory for acronyms. one way that me, is the fact that i'm always doing math and english assignments. so we have to remember specific meanings such as soapstone for documents, such as citing correctly. or pemdas for doing the equations correctly, even if it's the super long way. this works for everyone. you just have to find what works for you by practicing and repetition daily.