Problem 31 of 34geo-031
A ray starts at a point on a straight line. The two angles it forms with the line measure and . What is the measure of the larger angle?
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Solution walkthrough1:42
- Draw it. The two angles sit side by side on a straight line, and a straight line is .
- So the two angles add to : .
- Combine like terms: and , so .
- Subtract from both sides: . Divide both sides by : .
- The question asks for an angle, not . Use : and .
- Traps: is , not an angle. is the smaller angle. comes from using instead of .