Answer:
Step-by-step explanation:
According to Pythagoras Theorem a² + b² = c²
And the questio is having a right triangle in it so,
(Height of the building)² + (Length of the shadow)² = (The distance from the top of the building to the tip of the shadow)²
⇒ a² + (12)² = (20)²
⇒ a² = (20)² - (12)²
⇒ a² = 400 - 144
⇒ a² = 256
⇒ a = √256
⇒ a = 16
a^2+b^2=c^2
a=x
b=12
c=20
12 squared is 144
20 squared is 400
400-144=256
The square root of 256 is 16.
x=16
45.26
Pi was discovered way back already the way to Babylonians and Egyptians 216 BC but none were all the way accurate they were close
