Use the distance formula, AB=√[(1-(-9)]²+[(-1-(-3)]=√[100+4]=√104
use the same formula, AC=√52, BC=√52
AC²+BC²=52+52=104=AB²
Yes, it is a right triangle.
Answer:

Step-by-step explanation:
step 1
Find the circumference of the circle
The circumference is equal to

we have

substitute the values

step 2
Remember that
360 degrees subtends the arc of length
(circumference)
so
by proportion
Find the measure of θ by an arc of length 5 m
assume 

Let the number be x
3x + 5 = 20
3x = 20 - 5
x = 15/3
x=5
Answer:
If there are any rational roots, it would be a factor of your constant term (9) divided by a factor of the high-order coefficient (12).
Obliviously 1/2.
If you roll a die and you get two times 3 the probability to get another 3 is always 1/6