If four points are collinear, they are also coplanar. apex br /> a. true
b. false

B. False

Step-by-step explanation:

If four points are collinear, on the same line, then they don't have to be coplanar. Some of the points could be out of the plane, but still be collinear.

1. minimum

2. 6400

3. eight

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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°