Answer:
I'm guessing that makes obtuse triangle
why don't you try draw the triangle
Acute triangle : 0<x<90 degrees
right triangle : x=90 degrees
obtuse triangle :triangles that angles are bigger than 90 but smaller than 180 degrees
reflex angle:bigger than 180 but smaller than 360 degrees
First line because 4(2a+1)=8a+4 and 9a+4-(8a+4)= a
Second line because a times 2 =2a and 2a+1-2a=1
<span>Although the second equality is more or less obvious since 2a+1 leaves a remainder of 1 when divided by a.</span>
Best answer would be 4 out of 9 (4/9). This is in simplest form. To find probability in this form, find the amount of numbers less than ten (4), then put it over the amount of numbers in the list (9).
Hope this helped :)
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