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3 years ago

If m angle 8=22, m angle 7=31 and m angle EAD=102 , find m angle 9

Mathematics

2 answers:

Natalija [7]3 years ago

8 0

Answer:it’s nor 2!

Step-by-step explanation:

densk [106]3 years ago

6 0

2 is your answer i think it is <span />

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How to find all of the angles and sides of a triangle using sine

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Answer:

how to find them

Step-by-step explanation:

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2. The cosine of the angle = the length of the adjacent side. the length of the hypotenuse.

3. The tangent of the angle = the length of the opposite side. the length of the adjacent side.

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4 years ago

Find the area. The figure is not drawn to scale

poizon [28]

Answer:

96 square inches.

Step-by-step explanation:

From given picture we see that

BC=8 in

AD=10 in

Given that

AD=AB

Then AB=10 in

Apply Pythagorean theorem in triangle ABC to find AC

$(hypotenuse)^2=(base)^2+(perpendicular)^2$

$(AB)^2=(BC)^2+(AC)^2$

$(10)^2=(8)^2+(AC)^2$

$100=64+(AC)^2$

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$36=(AC)^2$

take square root

$6=AC$

Then area of triangle ABC $=\frac{1}{2}\left(base\right)\left(altitude\right)$

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There are total 4 congruent triangles.

Then total area of the given figure = 4(24)=96 square inches.

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3 years ago

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Answer:

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Step-by-step explanation:

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