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4 years ago

I've never even been taught this so idk please help! Thanks

Mathematics

1 answer:

DIA [1.3K]4 years ago

8 0

Answer:

(B) 52°

Step-by-step explanation:

The measure of a linear angle (∠BED) is 180°, so the sum of the two named angles will be that.

∠AED + ∠AEB = ∠BED = 180°

128° + ∠AEB = 180°

∠AEB = 52° . . . . . . . . . . . . subtract 128° from both sides of the equation

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3 years ago

Equivalent expression of x+4+3x

Andreas93 [3]

Answer:

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3 years ago

Solve for x in the triangle A 25.6 B 27.8 C 45.6 D 64.4

labwork [276]

Answer:

The measure of angle x is $64.4\°$

Step-by-step explanation:

To find the measure of angle X, apply the law of cosines

The law of cosines states that

$c^{2}=a^{2}+b^{2}-2(a)(b)cos(C)$

In this problem we have

$a=19\ cm$

$b=25\ cm$

$c=24\ cm$

$C=x\°$

substitute

$24^{2}=19^{2}+25^{2}-2(19)(25)cos(C)$

$576=986-950cos(C)$

$cos(C)=(986-576)/950$

$C=arccos[(986-576)/950]=64.4\°$

Therefore

The measure of angle x is $64.4\°$

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