You forgot to add in your height to your question. To find your area you need to do 8 + 14 and get 22 then you nee to do the height divided by two. If you give me the height of the triangle I can tell you the area.
You can perform all kind of operation that are one the inverse of the other, so that the value won't change. For example, you can multiply and divide by 2:

Or add and subtract 5:

Answer: 1.6km
Step-by-step explanation: 2.8km - 1.2km
The student is still north from school.
I hope this answer helped! :)
20 bicycles. two tires per one bike. 2*10=20