Question

can someone check my answer

Answer 1

The figure shows a triangular wooden frame ABC. The side AD of the frame has rotted and needs to be replaced:

What is the length of the wood that is needed to replace AD?

6.8 inches

6.2 inches

3.2 inches <--- my answer

2.8 inches

Answer 2

@jim_thompson5910

Answer 3

@wio

Answer 4

that's incorrect

how did you arrive at that answer?

Answer 5

I dont know my sister helped me with it and she got that answer can you please walk me through doing this?

Answer 6

how long is AB?

Answer 7

i don't know it doesnt give out the measurement

Answer 8

what is the measure of angle ACB?

Answer 9

45 degrees?

Answer 10

so what kind of triangle is triangle ACB?

Answer 11

Acute?

Answer 12

Am i right?

Answer 13

@jim_thompson5910 can we use any trigonometry functions in here?

Answer 14

you can use the tangent function or you can use the special 45-45-90 triangle

Answer 15

http://www.gradeamathhelp.com/image-files/45-45-90-triangle.jpg

Answer 16

I'm sorry but i'm really confused..

Answer 17

have you learned about tangent?

Answer 18

or about the special 45-45-90 triangle ?

Answer 19

Yes i have

Answer 20

just tangent

Answer 21

ok what can you tell me about tangent

Answer 22

do you want me to tell u the formula or just what it means?

Answer 23

anything you know about it works

Answer 24

i know the formula of tangent is opposite/adjacent and you can use it to find the angle measurements

Answer 25

and you can also use it to find missing side lengths (given an angle and a leg)

Answer 26

how do we find x?

Answer 27

I don't know i'm sorry..

Answer 28

Thats what i'm having trouble with

Answer 29

tangent = opposite/adjacent

tan(45) = x/16

x = ???

Answer 30

give me one sec to try and figure it out :)

Answer 31

i'm not sure if i'm right but i got x=16

Answer 32

HELP please! jim_thompson5910

Answer 33

correct, so AB = 16

Answer 34

what is the value of y?