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umka21 [38]
3 years ago
8

What is the value of x?

Mathematics
1 answer:
Sauron [17]3 years ago
8 0

Answer:

85°

Step-by-step explanation:

The triangle pictured is an isosceles triangle because side KJ = LJ.

this means that ∠JKL = ∠JLK = x°

Also recall that all interior angles of a triangle add up to 180°

Hence,

180° =  ∠JKL + ∠JLK + ∠KJL

180 =  x + x + 10

180 = 2x + 10  (subtract 10 from both sides and rearrange)

2x = 180 - 10

2x = 170 (divide both sides by 2)

x = 170 / 2 = 85°

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