Yes.
rectangle
By Definition, a triangle with two Congruent Sides is an Isosceles Triangle. For ALL angles to be Acute, that is, LESS than 90o , the two opposite angles must be greater than 45o. Remember that the SUM of the angles in a Triangle must equal 180o.
a scalene triangle.
Isosceles Triangle
A rhombus (4 congruent sides, diagonals perpendicular)that is not also a square (no right angles), andis also a parallelogram (opposite sides parallel and congruent, opposite angles congruent). It is also a quadrilateral, which has 4 sides.
The Isosceles Triangle Theorem:If two sides of a triangle are congruent, then the angles opposite the sides are congruent.The Converse of Isosceles Triangle Theorem:If two angles of a triangle are congruent, then the sides opposite those angles are congruent.
An isosceles triangle
always
The isosceles triangle theorem states that if two sides of a triangle are congruent, then the angles opposite those sides are congruent.
Yes, the base angles of an isosceles triangle are always congruent. An isosceles triangle commonly has two sides that are equal in length. The base angles are the angles opposite those two equal sides of the triangle. A geometric theorem states that if two sides of a triangle are congruent, then the angles opposite those sides are congruent. The converse is also true.
Any polygon with 2n sides (n integer) where opposite sides are parallel, will have its opposite angles congruent.
That is correct as in the case of an isosceles triangle
Yes, because of the base angles theorem converse: If two angles in a triangle are congruent, then the sides opposite the angles are congruent.
Congruent -gieco53-
Congruent -gieco53-
Correct as would be the case for an isosceles triangle or an equilateral triangle
congruent to one another.