Answer:
A good reason is to bring people together to answer questions that can improve millions of who watch to know more.
Step-by-step explanation:
18 feet and 1 once because there is a 8 inch difference between the boys height and his shadows height so it would be the same difference for the telephone pole making it 18 feet and 1 inch. :)
The shape is closed because the sides touch.
Since AB = CD the trapezoid is isosceles, which means that ∡A = ∡D
Therefore also ∡2 = ∡3 (they are half of the congruent angles)
For the properties of parallel lines (BD and AD) crossed by a transversal (BD) we have ∡3 = ∡CBD.
Now consider triangles AOD and BCD:
∡OAD (2) = ∡ADO (3) = ∡CBD (3) = ∡CDB (4)
T<span>he sum of the angles of a triangle must be 180°, t</span>herefore:
∡AOD = 180 - ∡2 - ∡3
∡BCD = 180 - ∡3 - ∡4
∡AOD = ∡BCD because their measure is the difference of congruent angles.
