<h2>Here we go ~ </h2>
According to given figure,


[ By linear pair ]

now, we can see that :

[ By Exterior angle property of Triangle ]


Answer:
whos your teacher ? i had a teacher that named ms.campbell
Step-by-step explanation:
Answer:
The awnser is C
Step-by-step explanation:
Let's say this number is a:
a*(a-9) = 90
a^2-9a-90 = 0
(a-15)(a+6) = 0
a = 15 or a = -6
Therefor a. would be the correct answer :)