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icang [17]
3 years ago
12

A quadrilateral has three angles that measure 80Á, 110Á, and 75Á. Which is the measure of the fourth angle?Select one of the opt

ions below as your answer: A. 50Á B. 90Á C. 95Á D. 125Á
Mathematics
2 answers:
kumpel [21]3 years ago
8 0

Answer:

C. 95^{\circ}

Step-by-step explanation:

Let x represent 4th angle of the given quadrilateral.

We have been that a quadrilateral has three angles that measure 80^{\circ}, 110^{\circ} and 75^{\circ}. We are asked to find the measure of the fourth angle.

We know that all the interior angles of a quadrilateral are equal to 360 degrees, so we can set an equation as:

x+80^{\circ}+110^{\circ}+75^{\circ}=360^{\circ}

x+265^{\circ}=360^{\circ}

x+265^{\circ}-265^{\circ}=360^{\circ}-265^{\circ}

x=95^{\circ}

Therefore, the measure of 4th angle is 95 degrees and option C is the correct choice.

TEA [102]3 years ago
5 0

Sum of all the angles in Quadrilateral is equal to 360

so, 360 = 80+110+75+x

x = 360-265

x = 95

OPTION C IS YOUR ANSWER.

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yellow marbles=5+ 3r(r is the number of red marbles)

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This question includes some misspelled words; here is the correct question:

Which point of view is most likely to be unreliable in a story?

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Answer:

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Step-by-step explanation:

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