Triangle ABC is similar to triangle DEF What are the lengths of sides DF and EF ?

The diagram shows a 7cm by 6cm rectangle based pyramid. all the diagonal sides - ta, tb, tc and td are length 10cm. m is midpoint of rectangular base. work out height mt to 1 decimal place

The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals