Answer: 226.19
Step-by-step explanation:
Answer:
Step-by-step explanation:
Given
span of bridge
height of span
Equation of Parabola
i.e.
length of Arc
A^2 + b^2 = c^2
a^2 + 9^2 = 18^2
a^2 + 81 = 324
a^2 = 243
a = 15.589 = 15.6 feet is the angle the ladder is at :)
A decagon has 10 sides therefore it has 10 interior angles