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Keith_Richards [23]
2 years ago
7

Find the value of Z in the picture

Mathematics
2 answers:
vivado [14]2 years ago
7 0

Answer:

172°

Step-by-step explanation:

Connect the center of the circle with two endpoints of the chord. You'll get the isosceles triangle with the angles adjacent to the base of

94^{\circ}-90^{\circ}=4^{\circ}

Then the angle between two congruent sided (two radii of the circle) is

180^{\circ}-2\cdot 4^{\circ}=172^{\circ}

This angle is central angle subtended on the arc z, so the measure of z is 172°.

stepan [7]2 years ago
7 0

Answer: OPTION B.

Step-by-step explanation:

It is important to remember that:

Tangent\ chord\ angle=\frac{1}{2}(Intercepted\ arc)

We can identify in the figure that 94° is the measure of a tangent chord angle. Then, we can find "x":

94\°=\frac{1}{2}x\\\\(2)(94\°)=x\\\\x=188\°

Since there are 360° in a circle, we can subtract 360° and the value of "x" to find the value of "z". Then we get:

z=360\°-x\\\\z=360\°-188\°\\\\z=172\°

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