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Eva8 [605]
3 years ago
8

A trapezoid is shown. 15 units 12 units 20 units What is the area, in square units, of the trapezoid?

Mathematics
1 answer:
Nana76 [90]3 years ago
5 0
The answer to this is D
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What are the x and y-intercepts of the line described by the equation?<br><br> 3x−9y=10.8
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3 0
3 years ago
PLZ HELP
Alex

Answer:

The correct option is C ) 109.5°

Therefore,

m\angle E=109.5\°

Step-by-step explanation:

Given:

In Triangle DEF

d = 10

e = 18

f = 12

To Find

angle E = ?

Solution:

In Triangle DEF , Cosine Rule says

\cos E=\dfrac{f^{2}+d^{2}-e^{2}}{2fd}

Substituting the values we get

\cos E=\dfrac{12^{2}+10^{2}-18^{2}}{2\times 12\times 10}

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Therefore,

\angle E=\cos^{-1}(-0.3333)

m\angle E=109.5\°       ............As it is in Second Quadrant

Therefore,

m\angle E=109.5\°

4 0
3 years ago
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