An isoceles triangle has at least two sides equal; an equilateral has three sides equal so it is also isoceles; and since all angles are acute it is also an acute traingle
Not necessarily. Rectangles are quadrilaterals and have no acute angles.
An isosceles trapezoid does not necessarily contain a right angle; it is defined by having at least one pair of parallel sides and two non-parallel sides that are equal in length. While some isosceles trapezoids can have right angles, it is not a requirement for all such shapes. The angles can vary, so the presence of right angles depends on the specific dimensions and angles of the trapezoid in question.
No
No.
An isoceles triangle has at least two sides equal; an equilateral has three sides equal so it is also isoceles; and since all angles are acute it is also an acute traingle
Not necessarily. Rectangles are quadrilaterals and have no acute angles.
No. There are quadrilaterals that have no right angles.no,what about a trapizoid or rhombus
No.
Not all 4 sided quadrilaterals have lines of symmetry.
An isosceles triangle is one with at least two equal sides.
It is an isosceles triangle and an isosceles trapezoid
An isosceles trapezoid does not necessarily contain a right angle; it is defined by having at least one pair of parallel sides and two non-parallel sides that are equal in length. While some isosceles trapezoids can have right angles, it is not a requirement for all such shapes. The angles can vary, so the presence of right angles depends on the specific dimensions and angles of the trapezoid in question.
No.
No.
No
No, because all quadrilaterals have 4 straight sides.