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If all 4 sides are equal and the angles are not 90 degrees it is a rhombus.
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What quadrilateral has 2 sets of parallel sides of equal length?
A square has 3 sets of parallel sides of equal length AND all the angles are 90 degrees. A rhombus has 2 sets of parallel lines of equal length, but the angles aren't all 90 degrees.
Are all angles of a parallelogram equal to 90 degrees?
No, only in a square (regular parallelogram).The opposite angles are EQUAL in a parallelogram, and the adjacent angles are SUPPLEMENTARY(they equal 180 degrees).So if any angle in a parallelogram is a right angle, they all are. Otherwise, there are no right angles.The angles of a parallelogram will average 90 degrees, as there are 360 degrees in any quadrilateral, (360/4 - 90) and 180 degrees in two adjacent non-equal angles (180/2 = 90).
What does complimentary angles mean?
Complimentary angles are a pair of angles where the sum of their degrees equal 90.
What is 2 angles that equal 90 degrees called?
complimentary
Are all triangles acute?
NO!!! Equilateral ; All angles acute (60 degrees) ; all sides the same length Isosceles ; Two angles are equal, the third angle may be acute or obtuse ; two sides are equal , third side unequal Right- Angles Triangle ; Maybe Isoscles , but MUST have one right angle(90 degrees) Scalene ; All angles are different, may be obtuse ; All sides are different. NB Any angle less than 90 degrees is Acute Any angle greater than 90 degrees but less than 180 degrees is Obtuse Any angle greater than 180 degrees (- 360 degrees) is Reflex.
How many different crystals are crystals classified into?
Seven. They are: Cubic - all angles 90 degrees, all sides equal length Trigonal - all angles 90 degrees, two sides equal and the third unequal Orthorhombic - all angles 90 degrees, no sides equal Hexagonal - two angles 90 degrees and one angle 120 degrees, two sides unequal and the third unequal Trigonal - all angles equal but not 90, all sides equal Monoclinic - two angles 90, one more than 90, and no sides equal Triclinic - no angles equal, no sides equal For a graphical representation of these, see http://en.wikipedia.org/wiki/Crystal_system#Classification_of_lattices
Different kinds of triangles accrdg to sides and angles?
Angles: Acute->measures of angles all less than 90 degrees. Obtuse->One angle greater than 90 degrees. Right->One angle exactly 90 degrees. Equilateral->all equal sides Isosceles-> 2 equal sides Scalene->No equal sides
A quadrilateral with 4 equal sides and 4 equal angles?
This can only be a square: All 4 sides are equal, and all angles are equal to 90 degrees.
What is the difference between squares rhombuses and rectangles?
Squares have four sides of equal length and four right angles.Rhombuses (rhombi) have four sides of equal length but the angles are not right angles. Rectangles have four right angles but the sides are not all of the same length.
What has two sides equal lengths and all angles equal 90 degrees?
A rectangle.
What shape am I when all sides are equal and all angles are 90 degrees?
A square
What plane has opposite sides equal and parallel and no angles equal to 90 degrees?
A rhombus or a parallelogram
What is a3 sided polygon with 2 sides and 2 equal angles?
Right triangle. Two angles are 45 degrees, and the third angle is 90 degrees. Two sides are equal.
How many equal sides and right angles does an equilateral triangle have?
An equilateral triangle, has 3 equal sides and 3 equal angles. However, in a regular equilateral triangles, none of these angles are right angles (90 degrees), they are all 60 degrees.
What is a parrallelogram with equal sides?
A parallelogram with equal length sides is a RHOMBUS. A parallelogram with equal sides and the four angles are at 90 degrees is a SQUARE.
What polygon is a square?
Four sides of equal length. All four angles equal (90 degrees).
What angles combine to equal 90 degrees?
Angles combining to equal 90 degrees are known as complementary angles.
