What you would do is round 47.6 to 48. You would then round 39.75 to 40. Then you add 48 & 40 to get 88.
A^2+b^2=c^2 and for the radios try 4
The main idea is using the Pythagorean formula to find the length of line segment .
Alr so you use the formula
is already given and is
and is
So using algebraic rules you'll get as:
Now using the formula: , you can find the area of tri ABD and CBD which would be and so add them up and you get !
Can you please show us the excerpt? :)