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3 years ago

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Mathematics

1 answer:

LenKa [72]3 years ago

4 0

2:7 , 2 to 7, 2/7 <====

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Flauer [41]

Answer:

Step-by-step explanation:

Statements Reasons

1). AD ≅ BC 1). Given

2). ∠D ≅ ∠C 2). Given

3). ∠DEA ≅ ∠CEB 3). Vertically opposite angles

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Hence, proved.

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3 years ago

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KatRina [158]

Answer:

144

Step-by-step explanation:

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3 years ago

What is the value of 3-(-2)?

777dan777 [17]

Answer:

Step-by-step explanation:

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2 years ago

9 meters higher than altitude X

aleksklad [387]

X+9 ? I'm not sure if that was the kind of answer you were looking for but that's what I got out of that.

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3 years ago

Please Hurryyy

Helga [31]

The measure of angle J is 19.8°, and the correct option is D.

<h3>What is the formula of cosine?</h3>

The law of cosine or cosine rule in trigonometry is a relation between the side and the angles of a triangle. Suppose a triangle with sides a, b, c and with angles cosC.

The following formula is used to find the angle j is;

$\rm j^2 = h^2 + i^2 -2hicosC$

Triangle HIJ has side lengths h=12, i = 17, j = 7.

Substitute all the values in the formula;

$\rm j^2 = h^2 + i^2 -2hicosJ\\\\(7)^2=(12)^2+(17)^2-2 \times 12 \times 17 cosJ\\\\49=144+289-408cosJ\\\\144+289 -49 =408cosJ\\\\384 =408cosJ\\\\cosJ=\dfrac{384}{408}\\\\cosj = 0.94\\\\J =cos^{-1}(0.94)\\\\J=19.8$

Hence, the measure of angle J is 19.8°, and the correct option is D.

Learn more about law cosine here;

brainly.com/question/17289163

#SPJ1

3 0

1 year ago