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Can someone please have a look at this maths question? (C1)

The triangle with vertices (0,0) (1,p), (10,0) is right angled. Find the two possible values of p.

Some guidance please?

Reply 1

Kevin De Bruyne

Original post by honour

The triangle with vertices (0,0) (1,p), (10,0) is right angled. Find the two possible values of p.

Some guidance please?

Plot (0,0), (10,0) and draw the line x = 1 and work from there :smile:

Reply 2

Chemgawd99

firstly draw sketch. always helps :smile:

. hint product of perpendicular gradients = -1

Reply 3

Zacken

It's right-angled. So it satisfies Pythagoras's theorem. Can you apply this here? You should end up with a quadratic in

p

Reply 4

frostfly

Original post by Chemgawd99

firstly draw sketch. always helps :smile:

. hint product of perpendicular gradients = -1

But the gradient of the line passing through (0,0) and (10,0) is 0... what multiplies 0 to get -1?

Reply 5

Chemgawd99

Original post by honour

But the gradient of the line passing through (0,0) and (10,0) is 0... what multiplies 0 to get -1?

sketch the triangle and you will see line passing through (0,0) (1,p) and line passing through (1,p) (10,0)

Reply 6

AvogadrosAvocado

the answer is p=3 and p=-3

(edited 7 years ago)

Reply 7

AvogadrosAvocado

i will post the working one min

Reply 8

frostfly

Original post by perks23

Thank you ever so much! Your presentation is so neat! :smile:

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Can someone please have a look at this maths question? (C1)

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