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5 votes
Can someone please help me with this

Can someone please help me with this-example-1

1 Answer

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clearly its an isosceles triangle (two sides are equal)

then according to the theorem the third angle which is in front of 21 should be

and we know that sum of 3 angles in triangle is 180

x+x+38=180

2x=142

x=71
User Mohammad Kurjieh
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