How do you know which step makes an error
1 answer:
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Answer:
x= 78
Step-by-step explanation:
Focus on the blue traingle:
∠BHI= 180° -47° -31° (∠sum of triangle)
∠BHI= 102°
x°= 180° -102° (adj. ∠s on a str. line)
x°= 78°
x= 78
<u>Alternatively</u><u>,</u>
x°= 47° +31° (ext. ∠ of triangle)
x°= 78°
x= 78
