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Q: If one angle of a rhombus is 90 degrees it must be a square?
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Is a Square 90 degrees?

No, one angle of a square is 90 Degrees. Since there are 4 angles in a square you must multiply the degree of one right angle by 4. Therefore a square actually measures 360 degrees.


What is a parallelogram with all sides congrent?

A rhombus, or a square if there's a right angle. ( if there's one, there must be 4!)


If KLMN is a square can it be a rhombus?

The answer is it must be a rhombus


How many right angles are there in a rombose?

A rhombus doesn't need any right angles to be a rhombus, although it can have them if it wants to. If a rhombus has right angles, then it's a square. And if it has one right angle, then it must have four of them.


The square and the rhombus are different because?

ms. claudia always told me that a square can be a rhombus but a rhombus cant be a square. another way is a square has 4 90 degree angles but a rhombus has 4 45 degree angles, because all figures must always ALWAYS ALWAYS add up to 360 degrees.


Can an rhombus have an obtuse angle?

A rhombus must have a pair of opposite angles which are obtuse (and equal).


Can someone help with deductive proofs please?

The idea is to show something must be true because when it is a special case of a general principle that is known to be true. So say you know the general principle that the sum of the angles in any triangle is always 180 degrees, and you have a particular triangle in mind, you can then conclude that the sum of the angles in your triangle is 180 degrees. So let's look at one you asked about so you get the idea. The diagonals of a square are also angle bisectors. Since we know a square is a rhombus with 90 angles, if we prove it for a rhombus in general, we have proved it for a square. Let ABCD be a rhombus. Segment AB is congruent to BC which is congruent to CD which is congruent to DA Reason: Definition of Rhombus Now Segment AC is congruent to itself. Reason Reflexive property So Triangle ADC is congruent to triangle ABC by SSS postulate. Next Angle DAC is congruent to angle BAC by CPCTC And Angle DCA is congruent to angle BCA by the same reason. We used the fact that corresponding parts of congruent triangles are congruent to prove that diagonals bisect the angles of the rhombus which proves it is true for a square. The point being rhombus is a quadrilateral whose four sides are all congruent Of course a square has 4 congruent sides, but also right angles. We don't need the right angle part to prove this, so we used a rhombus. Every square is a rhombus, so if it is true for a rhombus it must be true for a square.


Which quadrilateral must have diagonals that are congruent and perpendicular?

The quadrilateral that must have diagonals that are congruent and perpendicular is the square. This is because its diagonals form a right angle at its center.


If KLMN is a square then?

It must be a rhombus


If all four sides of a quadrilateral are congruent the quadrilateral?

Yes, and it also must be a rhombus. Squares also fit this description as a square is technically also a parallelogram and a rhombus.


What quadrilateral can have a diagonal line and is made with 2 equilateral triangles?

A Rhombus. If it makes two equilateral triangles with a diagonal, the shape must have all four sides of equal length; thus it is a rhombus, possibly a square. As an equilateral triangle is made, the angle between two of the sides is 60o; which is not 90o, so it can't be a square, so it must be a rhombus.


How is a square different from a rhombus?

For a square, both of the diagonals equal each other, but on a rhombus the diagonals can equal each other, but it's possible for them to not equal each other. The angles are equal on a square (90 degrees). On a Rhombus, opposite angles are equal but adjacent angles need not be equal.In a rhombus, the sides don't have to be perpendicular to each other. In a square, all angles are 90 degrees.A square is a rhombus, but a rhombus is not a square. A square has all 90 degree angles.The sizes of the angles do not have to equal 90° as in a rhombus, they do in a square.A rhombus has 4 equal sides. A square has 4 equal sides and also 4 equal angles that are right angles. A square is a special case of a rhombus