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nexus9112 [7]
4 years ago
5

Find the value of x.

Mathematics
1 answer:
Crank4 years ago
8 0
∠A=66
∠B=x
∠C=?
∠D=117

Ok, lets sovle for ∠C first.
180-117=∠C
63=∠C

Ok, now we can solve for ∠B or x.
66+63+x=180
129+x=180
-129     -129
x=51

Hope this helps!  :)
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3 years ago
Anybody know the answer?
marysya [2.9K]
I'd start by writing an equation for each of the right triangles. (Pythagorean theorem)

y² + 9² = z²
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substitute y² for (x² - 4²) in 1st equation.

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6 0
3 years ago
Consider a particle moving around a circle with a radius of 38cm. It rotates from 10 degrees to 100 degrees in 11 seconds. Calcu
kifflom [539]

Step-by-step explanation:

Given that,

Radius of circle, r = 38 cm = 0.38 m

It rotates form 10 degrees to 100 degrees in 11 seconds i.e.

\theta_i=10^{\circ}=0.174\ rad

\theta_f=100^{\circ}=1.74\ rad

Let \omega is the angular velocity of the particle such that, \omega=\dfrac{\omega_f-\omega_i}{t}

\omega=\dfrac{1.74-0.174}{11}

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v=r\times \omega

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So, the instantaneous velocity of the particle is 0.053 m/s. Hence, this is the required solution.  

6 0
3 years ago
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