If m<2= 123, m<12=38 and m<18=100, find the measure of each missing angle.

see below

Step-by-step explanation:

a) ∠1 = 180 - 123  = 57°

b) ∠3 = 100°  (congruent to ∠18)

c) ∠4 = 180 - 100 = 80°

d) ∠5 = 123°  (opposite to ∠2)

e) ∠6 = 57°  (opposite to ∠1)

f) ∠7 = 38° (alternate angle to ∠12)

g) ∠8 = 180 - ∠7 - ∠9 = 180 - 38 - 100 = 42°

h) ∠9 = 100° (congruent to ∠18)

i) ∠10 = 57° (congruent to ∠1)

j) ∠11 = 180 - ∠10 - ∠12 = 180 - 57 - 38 = 85°

k) ∠13 = 100° (parallel angle to ∠3)

l) ∠14 = 80° (parallel angle to ∠4)

m) ∠15 = 123° (parallel angle to ∠5)

n) ∠16 =  57° (parallel angle to ∠6)

o) ∠17 = 80° (opposite angle to ∠14)

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°

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct