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Dafna1 [17]
3 years ago
14

What is the measurement of ABC ​

Mathematics
1 answer:
Alinara [238K]3 years ago
4 0

Answer:

m<ABC=40

Step-by-step explanation:

Ok so we need to break up this problem.

m<ABC=4x

m<BCA=7x-20

m<A= 90 degrees (We are given a right angle here)

Because of the Triangle Sun Theorem, all the angles here would add up to 180 degrees. So..

4x+7x-20+90=180  

Solve

x=10

Then we look back and see that m<ABC is 4x

We plug in x

4(10)=m<ABC

m<ABC=40

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Answer:

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Step-by-step explanation:

AB+AC=AC this is because B is in between A and C. So now we can substitute all of the line segments, so we have

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3x-3=30      Now you add 3 to both sides so you can get 3x alone on one side

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The next step is to substitute x to find BC.

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You can check your work by doing AB+BC=AC

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