let's see we have not heard my six twenty five would be three hundred minus twenty is going to two hundred two hundred and seventy-five over four and so dm is going to be equal to the square root of this citicorp to the square root of two seventy five or four to seventy five is twenty five times eleven twenty five times twelve would be three hundred twenty-five times eleven or for so this is going to be equal to five square roots of eleven over too sodium is five square roots of eleven or her too now if we could just figure out so when you do here is figure out the height of this triangle right over here we could figure out the height of that triangle where we're pretty much done one-half the base times a height but we don't know who see we could figure that if we know the loft co-signed into something over there for another sign of the single right over here if we know the sign of that angle the side of that angles going to be this over the side we just figured out sofa to figure out the side of that angle then we'd be done or robi very close to being done that's not any obvious way but one thing we can do if you look at this bigger triangle overhear salami highlighted so if you look at triangle be and c redraw triangle bmc devote artist from destroying right over here and want to get to overload of the triangle b amma see right over here we know this side twenty-five over to we know this side over here twenty five or two we know this side over years twenty four and we know this so what we want to do is figure out the sign of the single right here the sign of data of anglesey and d now that's hard to do but what we can't do is use a lot of course i had the stayed up