Question

help?

Answer 1

Could I help you?

Answer 2

yes

Answer 3

Any ideas?

Answer 4

nope

Answer 5

Ok
start with (a)?

Answer 6

yes

Answer 7

Ok

Answer 8

ok

Answer 9

As a result of the given: AN // RI
so that: angle 1 = angle 2
and
angle 3 = angle 4
and the angle 5 is common.
so we can conclude that:

triangle TAN is similar to triangle TRI

oK?

Answer 10

ok

Answer 11

now (b)?

Answer 12

yes

Answer 13

Great!

Answer 14

As a result of this similarity, the ratio of the corresponding sides are equal
like that:
\[\frac{ TA }{ TR }=\frac{ AN }{ RI }=\frac{ NT }{ IT }=\frac{ side.of.\small.\Delta }{ side.of.\large.\Delta }\]

Answer 15

@Book
Do you follow?

Answer 16

mhm

Answer 17

Where were you?

Answer 18

sorry im eating

Answer 19

Got what I wrote?

Answer 20

yup

Answer 21

So how can you apply it to get RI?

Answer 22

@Book
Why there is lack of response at your side?