Lian draws three lines on the board. Lines m and n are parallel. Lian says that the measure of <2 is 2··3 the measure of <1. What is the measure of <2?
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Using the property of interior angles on same sides
2x−8+3x−7=180
5x−15=180
x=39
∘
2x−8=2×39−8=70
3x−7=3×39−7=110
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Answer:
When two lines are parallel, any pair of alternate interior angles are congruent. In other words, if line m is parallel to line n, then <2 and <3 are congruent.
Step-by-step explanation:
- If Lian says that the measure of <2 is 2 times the measure of <1, we can set up an equation: <2 = 2*<1.
- We can use the fact that <2 and <3 are congruent to substitute <3 for <2 in the equation: <3 = 2*<1.
- Since <2 and <3 are congruent, we can use the equation <3 = 2*<1 to find the measure of <2. If <3 is equal to 2 times <1, then <2 must also be equal to 2 times <1.
- Therefore, the measure of <2 is also 2 times the measure of <1.
- To find the specific measure of <2, we would need to know the measure of <1. Without that information, we cannot determine the measure of <2.
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