In geometry, two figures or objects are congruent if they have the same shape
and size, or if one has the same shape and size as the mirror image of the other.
More formally, two sets of points are ...
As can be seen from the figure above, when two lines intersect, four angles are
formed. Each opposite pair are called vertical angles and are always congruent.
An angle is the intersection of two rays with a common endpoint. ... They are
always equal in measure. <1 and <3 are vertical angles. <2 and ... THEOREM:
Complements of the same angle, or congruent angles, are congruent.
Congruent Angles have the same angle (in degrees or radians). That is all.
Congruent Angles These angles are congruent. They don't have to point in the
Jan 24, 2013 ... Explain why vertical angles must be congruent .... The non-adjacent angles are
called vertical or opposite . Also, each pair of adjacent angles ...
These quadrilaterals are called parallelograms They take a variety of shapes, but
one ... They would never intersect because they are parallel. Notice, also, that the
opposite angles of a parallelogram are congruent, as are the opposite sides.
corresponding angles – two congruent angles on the same side of a line that
crosses two parallel lines ... What are two lines that never meet called? A) plane
Since the sum of the angles of a triangle is always 180 degrees... y + z = 90
degrees. The two sides of the triangle that are by the right angle are called the
legs... ... all the sides are the same length (congruent) and all the angles are the
A rhombus has two sets of parallel sides and all sides must be congruent. ...
Every parallelogram with four congruent sides and four 90° angles is a square.
Square ... If the two legs are congruent, then it is called an isosceles trapezoid.
When two parallel lines are cut by a third line, the third line is called the
transversal. In the example below, ... Recall that all pairs of vertical angles are