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aleksandr82 [10.1K]
3 years ago
5

Find the area of the polygon

Mathematics
1 answer:
Natali [406]3 years ago
5 0

Answer:

20 cm^2

Step-by-step explanation:

Sectioned it off and multiplied the length by the width

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Find each measurement indicated round your answers to the nearest tenth. Part 1d. NO LINKS OR ANSWERING QUESTIONS YOU DON'T KNOW
valkas [14]

Answer:

see explanation

Step-by-step explanation:

Using the Sine rule in all 3 questions

(1)

\frac{a}{sinA} = \frac{b}{sinB} , substitute values , firstly calculating ∠ B

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

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

a = \frac{18sin78}{sin53} ≈ 22.0 ( to the nearest tenth )

(3)

\frac{c}{sinC} = \frac{a}{sinA} , substitute values

\frac{35}{sinC} = \frac{45}{sin134} ( cross- multiply )

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

sinC = \frac{35sin134}{45} , then

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(5)

Calculate the measure of ∠ B

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\frac{a}{sinA} = \frac{b}{sinB} , substitute values

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

BC = \frac{10sin38}{sin50} ≈ 8.0 ( to the nearest tenth )

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3 years ago
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Anvisha [2.4K]

Answer:

-9

Step-by-step explanation:

x+2=-7

x+2-2=-7-2

x=-9

6 0
3 years ago
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