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maks197457 [2]
4 years ago
9

can someone help me please? whoever knows basically simple geometry could probably help. thanks in advance!

Mathematics
1 answer:
joja [24]4 years ago
6 0

Answer:

Angle 2 = 20°

Step-by-step explanation:

90+70=160

160+20=180

All of the angles inside a triangle will ALWAYS add up to 180°. So, if you have 2 angles already known, just add them together and find out what you need to add to that to get to 180.

Hope this helps! :)

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Check the picture below.

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\bf tan(\theta )=\cfrac{y}{x}\implies tan(\theta )=\cfrac{y}{15}\implies tan(\theta )=\cfrac{1}{15}\cdot y
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\stackrel{chain~rule}{sec^2(\theta )\cfrac{d\theta }{dt}}=\cfrac{1}{15}\cdot \cfrac{dy}{dt}\implies \cfrac{1}{cos^2(\theta )}\cdot\cfrac{d\theta }{dt}=\cfrac{1}{15}\cdot \cfrac{dy}{dt}
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\boxed{\cfrac{d\theta }{dt}=\cfrac{cos^2(\theta )\frac{dy}{dt}}{15}}\\\\
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3 years ago
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Volume_{smaller} = 9a*b*b = 9ab^2

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Where, l = 9a, w = a, h = a

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b. 9a^3 - 9ab^2 expressed in factored form:

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