Base angles.
Yes, normally there are two of them.
A trapezoid may have two right angles.
A trapezoid has two sets of equal angles
No, not all angles in a trapezoid are congruent. A trapezoid may have two pairs of congruent angles, or may have no congruent angles.
A right trapezoid has at least two right angles.
There are two pairs of congruent base angles in an isosceles trapezoid.
Yes, normally there are two of them.
A trapezoid always has two acute angles. the base angles have to be acute because the lower base angles and the upper base angles are complementary so since the upper base angle is always obtuse, the lower base angles have to be acute.
'never'
It is a trapezoid in which the non-parallel sides are of the same length and subtend equal angles with the base. It can be viewed as an isosceles triangle whose apex has been removed by a line parallel to its base.
The pair of angles at the end of each parallel side - the two base angles and the two top angles - are congruent.
A trapezoid may have two right angles.
A trapezoid has two sets of equal angles
No, not all angles in a trapezoid are congruent. A trapezoid may have two pairs of congruent angles, or may have no congruent angles.
A trapezoid can have either none or two right angles.
A right trapezoid has at least two right angles.
If the two sides which are not parallel have equal lengths, then the trapezoid is called an isosceles trapezoid (standard trapezoid has unequal sides). The base angles in an isosceles trapezoid are equal in measurement, also I know that a trapezoid with two nonparallel sides the same length is called an isosceles trapezoid.