What type of triangle is formed by joining the points D(7, 3), E(8, 1), and
d.)acute scalene triangle
e.)obtuse scalene triangle
Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
use distance formula to find the lenghts of sides:
im lost on how to do that?
Each of the five choices requires a verification of a different property. Unless you are prepared to run each of the 5 tests to choose the option, you could graph the points to help you see which type of triangle it is likely to be, and then do that particular test to confirm.
Graphing three points does not take more than a minute, and is a good investment.
To me it looks like a right triangle.
We will assume that it is a right triangle right angled at E.
In that case, we would have DE perpendicular to EF.
So calculate the slopes of m1=DE and m2=EF, then show that m1*m2=-1.
To calculate slope, use
slope = (y2-y1)/(x2-x1)
Slope of DE, m1= (7-8)/(3-1)=-1/2
Slope of EF, m2 = (8-4)/(1-(-1))=2
So since m1*m2=-1, we conclude that triangle DEF is a right triangle.
Alternatively, use @AlexandervonHumboldt2 's suggestion, and calculate the squares of each side:
Since DE^2+EF^2=FD^2, the triangle is a right triangle.
We can also see that it is not an isosceles triangle, nor an equilateral triangle, nor acute, nor obtuse (since it is a right triangle).