What’s the value of x??

C. √55.

Step-by-step explanation:

The vertical line cuts the base of the triangle in 2 so the right angled triangles both have a base 3 cm long.

So by Pythagoras:

8^2 = x^2 + 3^2

x^2 = 8^2 - 3^2

x^2 = 55

x = √55.

trapezoid

step-by-step explanation:

first i plotted all my points on a grid graph

i made sure all of them were in the correct quadrant

then i saw it was a trapezoid or a quadrilateral

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°