Answer:
- Not an isosceles trapezoid
Step-by-step explanation:
Step 1
Parallel lines have equal slopes.
Use the slope formula to find the slopes of AB and CD and then compare
- m(AB) = (5 - 3)/(3 - (-5)) = 2/8 = 1/4
- m(CD) = (1 - (-2))/(6 - (-6)) = 3/12 = 1/4
The slopes are equal, so we can confirm the sides are parallel
Step 2
Use the distance formula and find the length of AD and BC and then compare
- [tex]d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]
- [tex]AD=\sqrt{(-6-(-5))^2+(-2-3)^2} = \sqrt{1+25} =\sqrt{26}[/tex]
- [tex]BC=\sqrt{(1-5)^2+(6-3)^2} = \sqrt{16+9} =\sqrt{25}=5[/tex]
The lengths are not equal, so the trapezoid is not isosceles