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In ΔABC, what is the value of x? 5.5 6.5 55 65
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2 votes
In ΔABC, what is the value of x?

5.5
6.5
55
65

In ΔABC, what is the value of x? 5.5 6.5 55 65-example-1
User Baqir Khan
by
5.9k points

2 Answers

5 votes
The internal angles of a triangle adds up to 180.
10x-10+8x+10x+8=180
Collect like terms
10x+8x+10x=180+10-8
28x=182
Divide by 28 throughout
28x/28=182/28
X=6.5
User XiaoYao
by
5.1k points
6 votes
The 3 angles of a triangle add up to 180 degrees so:-

10x - 10 + 10x + 8 + 8x = 180
28x = 180 + 10 - 8
28x = 182
x = 6.5 (answer)
User Trushkevich
by
6.2k points
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