3. a sign company is building a sign with the dimensions shown. what is the area, in square feet, of the sign? round to the nearest foot. justify your answer by showing your work. (5 points)

84.87sq ft

Step-by-step explanation:

Let ABC be the triangle and  AD be the perpendicular on BC such that BD=DC=7ft.

Now, it is known that

Now, in triangle ADC, we have

Now, area of the triangle=

=

=

Thus, area of the building is 84.87sq ft.

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

i am unable to solve this problem

step-by-step explanation: