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Instructions: Find the measure of the angle.

Instructions: Find the measure of the angle.-example-1
User Nilly
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1 Answer

19 votes
19 votes

Answer:

Explanation:

Remark

The figure inside the circle is a quadralateral. The 4 angles touch the circumference of the circle. The figure is further defined as a cyclic quadrilateral.

One of the properties of such a figure, is that the opposite angles are supplementary. That is they add to 180.

Equation and solution

? + 100 = 180 Subtract 100 from both sides

? + 100 - 100 = 180 - 100

? = 80 degrees

Answer

? = 80

User Jimt
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