Question

Help with angles/similar figures please! I will Fan & medal!

Answer 1

The one above this comment is an angle I need help with and the one below is similar figures.

Answer 2

this one is not about angles

it tells you the triangles are congruent - this means that one of them is simple 'scaled up version of the other

look at sides AC and XZ

tell mee what the multiplying (scale) factor is between them (what do you need to mulktiply 6 by to get 15?)

Answer 3

what is the question for the second one?

Answer 4

the second one is tell if they are similar or not

Answer 5

for your first comment, 6 x 2.5 = 15 if that's what your asking

Answer 6

Sorry - my first comment was incorrect - the triangles are 'similar' NOT congruent. But the rest of my reply is correct

look at sides AC and XZ

OK so ALL the side have the same scale factor
So compare AB and XY and apply the same scale factor

Answer 7

In similar triangles ALL the angles are the same

that answers the second one for you

Answer 8

3.25.. so is N 3.25 or 2.5?

Answer 9

No - when you worked out the ratio above you found it was 2.5

so the larger triangle has sides 2.5 times bigger than the smaller one

So compare AB and XY and apply the same scale factor

Answer 10

what do you mean by 'apply the scale factor?' are you saying multiply 3.25 by 10?

Answer 11

the top of the diagram tells you the triangles are similar (that's what the ~ means)

Similar triangle have the same shape (i.e. all the angles are the SAME) but may be different SIZES

you found that ONE side of the triangle is multiplied by 2.5 to go from the smaller to the larger - but this is true for ALL the sides

so AB is equivalent to XY and you know that AB is 10 so XY has to be 2.5 times bigger

Answer 12

http://www.mathopenref.com/similartriangles.html

go here for more explanation

Answer 13

Thank you.