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stealth61 [152]
3 years ago
11

Can a right triangle ever have an obtuse angle?

Mathematics
2 answers:
SCORPION-xisa [38]3 years ago
5 0
No because a right triangle always has a right angle
MakcuM [25]3 years ago
5 0
Think about it....a triangle has all 3 angles, when added, equal to 180 degrees....if one angle is a right angle (90 degrees). that would mean the other 2 angles have to add up to 90 degrees. An obtuse angle is more then 90 degrees. So ur answer is No....a right triangle can never have an obtuse angle.
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8 0
3 years ago
What is the equation of the line that passes through (-3, -1) and has a slope of 2/5? Put your answer in slope-intercept form.
Zanzabum
Hi there!

The general formula of A line in slope-intercept form is the following:
y = mx + n

In this formula m represents the slope of the line. Therefore, we can conclude that m = 2/5.
y =  \frac{2}{5} x + n

We also know that the line passes through the point (-3, -1) and we can therefore substitute this coordinate into the formula of the line.
x = -3 and y = -1

- 1 =  \frac{2}{5}  \times  - 3 + n

Multiply first.
- 1 =  -  1\frac{1}{5}  + n

And finally add 1 1/5 to both sides of the equation.
\frac{1}{5}  = n

We can now switch sides.
n =  \frac{1}{5}

Now we've found our value of n, which we can substitute into the formula of our line. Hence, in slope-intercept form, we find the following:
y =  \frac{2}{5}  x  +  \frac{1}{5}

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To find your constant of variation, you just need to figure out what you multiply the x by in order to get f(x). In other words, what do you multiply the 3 by to get 6? What do you multiply the 7 by to get 14? Another way to think of it is to divide f(x) by the x to get your constant. 
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