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How are the proofs for the side length ratios of 30-60-90 and 45-45-90 triangles similar? How are they different?

They both are 90 degree angles, but 45-45-90 triangles are isosceles and use the square root of 2. 30-60-90 triangles use the square root of 3 and the hypotenuse is double of the remaining side.

Step-by-step explanation:

correct on EDGE2021

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°

answer:   rotate 270° clockwise about (7, 1) and reflect across the line x = 7

step-by-step explanation:

because i took test