That is 30/80 that reduces down to 3/8
How u get it is 2 times 15 over 5 times 16 then divide 30 and 80 by 10 to get 3/8
The answer would be choice C.
Perpendicular lines cross each other and form a right angle as you can see marked in the third picture.
Answer:



<h3>-----------------------</h3><h3>hope it helps...</h3><h3>have a great day!!</h3>
Answer:
to know the summation of angles: (n-2)*180
here (n) represent numbers of sides
12)we have 5 sides (n=5)
(5-2)*180=540
x=540-(105+135+92+87)=121
13)we have 8 sides (n=8)
(8-2)*180=1080
x=1080-(116+158+141+124+136+132+129)=144
I hope it will help