Find each measurement indicated round your answers to the nearest tenth. Part 1d. NO LINKS OR ANSWERING QUESTIONS YOU DON'T KNOW!!! ​

see explanation

Step-by-step explanation:

Using the Sine rule in all 3 questions

(1)

= , substitute values , firstly calculating ∠ B

[ ∠ B = 180° - (78 + 49)° = 180° - 127° = 53° ]

= ( cross- multiply )

a sin53° = 18 sin78° ( divide both sides by sin53° )

a = ≈ 22.0 ( to the nearest tenth )

(3)

= , substitute values

= ( cross- multiply )

45 sinC = 35 sin134° ( divide both sides by 35 )

sinC = , then

∠ C = ( ) ≈ 34.0° ( to the nearest tenth )

(5)

Calculate the measure of ∠ B

∠ B = 180° - (38 + 92)° = 180° - 130° = 50°

= , substitute values

= ( cross- multiply )

BC sin50° = 10 sin38° ( divide both sides by sin50° )

BC = ≈ 8.0 ( to the nearest tenth )

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

2,160 π

step-by-step explanation: