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The slopes of two intersecting lines

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m₁ = 0.5

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m₂ = 3

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Formula for angle between two intersecting lines tanΘ = | m₁ - m₂ | / | 1 + m₁m₂ |

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tanΘ = | 0.5 - 3 | / | 1+ 0.5*3 |

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tanΘ = | -2.5 | / | 1+ 1.5 |

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tanΘ = 2.5 / 2.5

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tanΘ = 1

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Θ = 45°

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The angle between two intersecting lines of slopes 0.5 , 3 is 45°

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