86.7
Step-by-step explanation:
the circumference = 2 x pi x radius
13.8x2.3.14=86.7
87
there you go
2.2°
step-by-step explanation:
let θ = the angle of elevation.
tanθ =77/2020
tanθ = 0.038 12
θ = tan⁻¹0.038 12
θ = 2.2°