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Are co-interior angles equal?
Co-interior angles are not congruent. The only case in which they would be is if the transversal was perpendicular to the two parallel lines.
What is co-exterior angle?
A co-exterior angle is almost the same thing as co-interior:Two angles on the same side of the transversal (in a figure where two parallel lines are intersected by a transversal).They are supplementary angles (add up to 180º).They are exterior angles meaning they are outsideof the two parallel lines (opposite of interior angles which are inside the two parallel lines).
Are parallel lines in space coplanar?
Parallel lines will be co-planar.
What is true about an isosceles trapezoid?
its non parallel sides are equal. it is vertically symmetrical. any one pair of sides are parallel like in all trapeziums. the co-interior angles between the parallel sides sum up to 90 degrees.
How do you know that a trapazoid measures 360 degrees?
Consider the trapezium (or trapezoid) ABCD such that AD is parallel to BC.Then angles DAB and ABC are consecutive interior angles (or co-interior angles) and sum to 180 deg.Similarly, angles ADC and DCB sum to 180 deg.Therefore, the sum of all four is 180 + 180 = 360 deg.
