Answer:
<h3> B(10, 6)</h3>Step-by-step explanation:
If P is midpoint of AB and:
then:
Please help, x = ? thank you!
2 answers:
Answer: 9.8
Step-by-step explanation:
This is a question that requires you to use ratios and proportions. The quadrilaterals that you have shown in the picture are similar, meaning that they share similar ratios and proportions. Thus, we can assume this:
- 5:7
- 3:4.2
- 2:2.8
- 7:x
To solve for x, we can just take any other ratio and equal it to the 7:x ratio. I'll take 5:7 for example.
, which can also be rewritten as
Let's solve for x by cross-multiplying numbers that when a straight line is made, they are real numbers, and then divide.
Here, it should be:
The answer should be 9.8.
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My triangle solver says EF ≈ 7.5 ft.
_____
The law of cosines is usually used for this.
EF^2 = DE^2 +DF^2 -2*DE*DF*cos(D)
.. = 6^2 +11^2 -2*6*11*cos(40°)
.. ≈ 55.88
EF ≈ √55.88 ≈ 7.5 . . . ft
_____
The law of cosines is usually used for this.
EF^2 = DE^2 +DF^2 -2*DE*DF*cos(D)
.. = 6^2 +11^2 -2*6*11*cos(40°)
.. ≈ 55.88
EF ≈ √55.88 ≈ 7.5 . . . ft