Area of a rectangle with a base of 30 inches and a diagonal of of 34 inches ??? PLSS HELP THIS IS RLLY IMPORTANT !! I WILL GIVE BRAINLIEST!!!

Solve the equation for b: a= (1/2)(b)(h)

My final challenge question of the day! i have no tests, nothing to do this for, it is simply giving away free points for a you tube video! so 50 free points for answering the most simple question ever! here is the key to getting brainiest for this question. answer in under 50 seconds. you think you can do it. i think you can. here is the question: 1x2= i know! easiest question ever! and yes! if you answer this question, you will be on you so come on and get the free 50 while you can!

The length of the shadow of a building is 120 meters, as shown below: building shadow 120 m what is the height of the building? (1 point)