3 years ago

What is the measure of angle ABD in trapezoid ABCD? 24° 40° 64° 92°

1 answer:

3 0

M<A = m<D = 116
116 x 2 = 232
trapezoid , sum of interior angels = 360

so 360 - 232 = 128
but
m40° (second choice)

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2 years ago

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BlackZzzverrR [31]

Answer:

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3 years ago

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Answer:

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Now,

$Sum = \frac{a( {r}^{n} - 1) }{(r - 1)} \\$

So,

$\frac{a( {r}^{n} - 1)}{(r - 1)} = 728 \\ \frac{2( {3}^{n} - 1) }{(3 - 1)} = 728 \\ \frac{2( {3}^{n} - 1) }{2} = 728 \\ {3}^{n} - 1 = 728 \\ {3}^{n}=728+1\\ {3}^{n} = 729 \\ {3}^{n} = {3}^{6} \\ \boxed{ n = 6}$

Therefore, number of terms is 6

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