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asambeis [7]
3 years ago
5

Given: The measure of arc EY = The measure of arc YI, m∠EXY = 80°, and m∠K = 25°.

Mathematics
2 answers:
Degger [83]3 years ago
5 0

Answer:

Step-by-step explanation:

Let . By the inscribed angle theorem, we have

Then

Also by the inscribed angle theorem, we have

so that

Angles EXY and LXJ form a vertical pair so they are congruent and both have measure .

The sum of the interior angles to any quadrilateral is , so for quadrilateral KLXJ we get

So,

Read more on Brainly.com - brainly.com/question/12616099#readmore

Svetradugi [14.3K]3 years ago
3 0

Let x=m\widehat{EY}=m\widehat{YI}. By the inscribed angle theorem, we have

m\angle EJI=\dfrac12m\angle EOI=\dfrac12m\widehat{EI}=\dfrac{m\widehat{EY}+m\widehat{YI}}2=x^\circ

Then

m\angle KJE=(180-x)^\circ

Also by the inscribed angle theorem, we have

m\angle ELY=\dfrac12m\angle EOY=\dfrac12m\widehat{EY}=\left(\dfrac x2\right)^\circ

so that

m\angle KLX=\left(180-\dfrac x2\right)^\circ

Angles EXY and LXJ form a vertical pair so they are congruent and both have measure 80^\circ.

The sum of the interior angles to any quadrilateral is 360^\circ, so for quadrilateral KLXJ we get

25^\circ+\left(180-\dfrac x2\right)^\circ+(180-x)^\circ+80^\circ=360^\circ\implies x^\circ=70^\circ

So,

m\widehat{EI}=2x^\circ=\boxed{140^\circ}

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