Area of quadrilateral PQRS is equal to the sum of the area of triangle PSR and the area of
Free Quadrilaterals calculator - Calculate area, perimeter, diagonals, sides and angles for quadrilaterals step-by-step
It even showss the steps to solve a problem which is a great deal, amazing app, shows the graph, the equations, and let's me take pictures of my equations so I dont have go type it all in. Wonderful, really helps me with math homework, when i was younger i had to call my mom for her to check if i got the right answer on a problem, now with This app i just scan the math problem and i get the answer! I recommend using This app if you dont understand maths.
It also has a nice UI. The best free app that can help u with all of ur math problems I'm amazed. It helps me a lot and ypu can take pics of the problem, type it, or say it, the auto-focus of the app's camera needs adjustment though.
If you are facing so much problem and wanted one tap answer with clearification, simplifys or solves etc. I hate when other math apps lock solutions behind paywalls. It's amazing that it can recognise handwriting also and does it accurately. I needed to work on an assignment because I was sick and I was behind.