Answer:
A. 2 acute and 1 right angle.
Answer:
Step-by-step explanation:
The magnitude of 3D vector 
can be given by the following:
Plugging in given values, we have:
.
Answer:
Equation of line passing through point A = ( 19 , 3 ) , and point B = ( 20 , 3 ) is
y−3=0
OR
Equation of line passing through point A = ( 19 , 3 ) , and point B = ( 29 , 3 ) is
y=0x+3
Imagine the side of the building is one side to a triangle and the second would be from the top of the building to the point where the shadow ends and the third is from the base of the building to the point where the shadow ends. Just use the pythagoreon theorem to find stuff. I can't solve the problem you gave because you would need the height of the building
