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Gradient y2-y1/x2-x1 Length of a line sqrt((x2-x1)^2+(y2-y1)^2) Midpoint (x1+x2/2, y1+y2/2) How do you know if two lines are perpendicular? When you multiply the gradients together they should equal -1. The general rule is perpendicular = -1/m. Or you could use Pythagoras to show there is a right angle How do you know if two lines are parallel? The gradients should be the same What should you always remember when finding the square roots? The answer could...

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8 pages

Written in 2022/2023

Grade A+

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Gradient y2-y1/x2-x1 Length of a line sqrt((x2-x1)^2+(y2-y1)^2) Midpoint (x1+x2/2, y1+y2/2) How do you know if two lines are perpendicular? When you multiply the gradients together they should equal -1. The general rule is perpendicular = -1/m. Or you could use Pythagoras to show there is a right angle How do you know if two lines are parallel? The gradients should be the same What should you always remember when finding the square roots? The answer could be positive or negative What is...

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13 pages

Written in 2022/2023

Grade A+

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arithmetic sequence - correct Answ geometric sequence - correct Answ sum of arithmetic sequence 1 - correct Answn /2(2a + (n-1)d)

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1 pages

Written in 2025/2026

Grade A+

julie192620012

arithmetic sequence - correct Answ geometric sequence - correct Answ sum of arithmetic sequence 1 - correct Answn /2(2a + (n-1)d)

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1 pages

Written in 2025/2026

Grade A+

julie192620012

arithmetic sequence - correct Answ geometric sequence - correct Answ sum of arithmetic sequence 1 - correct Answn /2(2a + (n-1)d)

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1 pages

Written in 2025/2026

Grade A+

julie192620012

Pure Maths A Level Questions and Answers 100% Pass Gradient y2-y1/x2-x1 Length of a line sqrt((x2-x1)^2+(y2-y1)^2) Midpoint (x1+x2/2, y1+y2/2) How do you know if two lines are perpendicular? When you multiply the gradients together they should equal -1. The general rule is perpendicular = -1/m. Or you could use Pythagoras to show there is a right angle How do you know if two lines are parallel? The gradients should be the same What should you always remember when finding the square roots? T...

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13 pages

Written in 2022/2023

Grade A

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