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sergiy2304 [10]
3 years ago
14

The measures of three parts of triangle ABC are given in the diagram. What is AC, correct to two decimal places? A. 2.55 B. 5.01

C. 5.11 D. 6.74

Mathematics
2 answers:
maksim [4K]3 years ago
8 0

Option B. 5.01 units

this is the right answer... got it on plato :)

ur welcome ;)

White raven [17]3 years ago
6 0

Answer:

Option B. 5.01 units

Step-by-step explanation:

we know that

Applying the law of sines

\frac{c}{sin(C)}=\frac{b}{sin(B)}

we have

c=AB=3.61\ units\\C=41.82^o\\B=67.62^o\\b=AC

substitute the given values

\frac{3.61}{sin(41.82^o)}=\frac{AC}{sin(67.62^o)}

AC=\frac{3.61}{sin(41.82^o)}=sin(67.62^o)

AC=5.01\ units

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4 years ago
Hi I need to find DO length ​
MakcuM [25]

Answer:

10 cm

Step-by-step explanation:

If we assume that DC is parallel to AB, then triangle DOC is similar to triangle AOB.

However, even with this assumption, there is not enough information in the diagram to solve for DO.  We would also need to know the length of CO.  Then we could write a proportion:

DO / (DO + 20) = CO / (CO + 24)

Edit: OD is 2 cm shorter than OC.  If we call x the length of OD, then the length of OC is x+2.

Putting this into our proportion:

x / (x + 20) = (x + 2) / (x + 2 + 24)

x / (x + 20) = (x + 2) / (x + 26)

Cross multiply:

x (x + 26) = (x + 2) (x + 20)

Distribute:

x² + 26x = x² + 20x + 2x + 40

x² + 26x = x² + 22x + 40

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4 0
3 years ago
Please solve! It's really easy (I think).
Westkost [7]

Answer:

  • CD = 5.2 cm
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Step-by-step explanation:

<u>As per diagram we have:</u>

  • m∠A = 30°
  • m∠BCD = 30°

<u>As per 30° right triangle property:</u>

  • CD = √3×CB/2 = 3√3 ≈ 5.2 cm
  • and
  • AC = 2CD = 2×5.2 = 10.4 cm

<u>Area of triangle:</u>

  • A = 1/2bh
  • A = 1/2CB*AC
  • A = 1/2*5.2*10.4 ≈ 27 cm²
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