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VMariaS [17]
3 years ago
12

WILL GIVE BRAINLIST AS SOON AS I CAN. PLEASE HELP.​

Mathematics
2 answers:
kkurt [141]3 years ago
4 0

Answer:

x=1056.25

Step-by-step explanation:

(2x)(2x)(55)=(65)(65)(55) Multiply

4x(55)=232375    Divide 55 from each side

4x=4225   Divide each side by 4

x=1056.25

DedPeter [7]3 years ago
4 0

Answer:

x = 30

Step-by-step explanation:

Since the triangles are similar, that is

ΔABC and ΔDEC

The 3 angles in ΔDEC sum to 180°, thus

∠C + ∠D + ∠E = 180°, that is

55° + 65° + ∠E = 180°

120° + ∠E = 180° ( subtract 120 from both sides )

∠E = 60° and

∠E = ∠B = 2x = 60 ( divide both sides by 2 )

x = 30

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Hello.

1. Understand that this requires inverse trigonometry.
2. For A, we can use sin^-1 if we want (we could use cos^-1 or tan^-1 as well because all sides are given)
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From the picture you provided,

The angle values make sense because that triangle represents a 30-60-90 degree triangle. (Also, a good trick is to know that the smallest angle of a triangle will always have the smallest side value, and the largest angle has the largest side value.)
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