Question

I wasn’t at school when the teacher taught this and I don’t understand this, can you help me? Thank you!

Answer 1

Hi,

Explanation:

9.

`\begin {array} cside&left&right&ratio\\------&-----&------&-----\\m\ hypotenus&15&5&(15)/(5)=3 \\m\ smallest\ leg&4&(4)/(3)&(4)/((4)/(3) )=3 \\m\ greatest\ leg&x&4&(x)/(4) \\------&-----&------&-----\\\end {array}\\\\\\(x)/(4)=3 \Longrightarrow\ x=12`

10.

`(x)/(3) =(10)/(7.5) \\\\x=(10*3)/(7.5) \\\\x=4\\`

11.

`(x)/(12) =(3)/(3+6) \\\\\\x=(3*12)/(9) \\\\x=4\\`