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Can you help me understand. Find the value of x in the triangle

Can you help me understand. Find the value of x in the triangle-example-1
User Lucas Saldanha
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1 Answer

21 votes
21 votes

The sum of the interior angles of a triangle is 180, so in order to find x we will have the next equation

78+x+x=180

we sum like terms

78+2x=180

then we isolate the x

2x=180-78

x=102/2

x=51

User Logan Tegman
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