A parallelogram cannot have only two congruent sides, nor only two congruent angles.
opposite or vertical angles
Only the two angles which are connected by the shorter diagonal will be congruent. The other two angles will not necessarily be congruent.
Two angles are said to be congruent if they are equal.
Not always. If two angles are congruent then they simply have equal measure. They must only be right angles if they are supplementary, that is, they must both add up to 180 degrees.
If two angles are vertical then they are congruent.
Vertical angles are always, by definition, congruent. Note: If the two vertical angles are right angles then they are both congruent and supplementary.
vertical angles are always congruent...they are two nonadjacent angles formed by intersecting lines. Vertical angles are congruent..or equal in measure
No. An angle can have only one angle!
Whenever two lines intersect, vertical angles refers to the angles opposite each other
A parallelogram cannot have only two congruent sides, nor only two congruent angles.
Do you mean the two angles that are formed by two intersecting lines? If yes, they are called vertical angles and they are congruent.
opposite or vertical angles
Vertical angel
Only the two angles which are connected by the shorter diagonal will be congruent. The other two angles will not necessarily be congruent.
I think you mean vertical angles. Vertical angles are formed by two intersecting lines that make what looks like an X. Vertical angles are the two angles that are across from each other, either the top and bottom 2 angles or the left and right 2 angles. Vertical angles are also always congruent!
Do you mean "Are two vertical angles always congruent?" Vertical angles are always congruent, but congruent angles do not have to be vertical. Any two angles with the same angle measurement are considered congruent by definition. The reason why vertical angles are always congruent is explained below. Imagine (or draw) an X forming 2 pairs of vertical angles. ∠1 is to the left, ∠2 is on top, ∠3 is to the right, and ∠4 is on the bottom. Vertical angles are always congruent because ∠1 and ∠2 are supplementary, meaning that their measures add to 180 degrees. The measures of ∠2 and ∠3 also add to 180 degrees. This means that m∠1+m∠2=180 and m∠2+m∠3=180. Using the Transitive Property, it becomes m∠1+m∠2=m∠2+m∠3. If you subtract the measure of ∠2 from both sides, it becomes m∠1=m∠3. I hope that helped!