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Abcd is a parallelogram ab equals bc and angle abc equals 90 degree explain why abcd is a square?
Wiki User
∙ 14y ago
Opposite sides of a parallelogram are equal. So ab = dc and ad = bc. But you are also told that ab = bc. So all four sides are equal.
Opposite angles of a parallelogram are equal. So abc =90 degrees implies that cda is 90 degrees. The remaining two angles add up to 360 - (abc + cda) = 180 degrees and both are equal. So they, too , must be 90 degrees each. So all four angles are equal.
A parallelogram with four equal sides and four equal angles is called a square.
Wiki User
∙ 14y ago
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What are the names of the quadrilaterals with ninety degree angles?
Square rectangle rhombus parallelogram
What is a parallelogram with 4 ninety degree angles?
...There is no such thing. It would be a square. It's a square. -____- at the person before me.
A square is a parallelogram.?
No, a parallelogram is not always a square, but a square is a parallelogram.
Is a square or trapezoid have a special name and is a parallelogram?
Square = parallelogram and a square trapezoid = trapezoid Parallelogram = Parallelogram
Is a parallelogram is a square?
No, a parallelogram is not necessarily square.However, by definition, a square is always a parallelogram.
What does a parallelogram with a 45 degree angle look like?
Since a parallelogram has two sets of parallel sides, a parallelogram containing a 90 degree angle would precisely resemble a square.
A parallelogram with four equal sides and four 90 degree angles?
A square is a parallelogram with 4 equal sides and 4 90 degree angles.
Explain why a square is a parallelogram and a rhombus?
A square is a parallelogram because it has two sets of parallel sides. It's a rhombus because every side is the same length.
What are the names of the quadrilaterals with ninety degree angles?
Square rectangle rhombus parallelogram
What is a parallelogram with 4 ninety degree angles?
...There is no such thing. It would be a square. It's a square. -____- at the person before me.
Is a A square a parallelogram?
No, a parallelogram is not always a square, but a square is a parallelogram.
A square is a parallelogram.?
No, a parallelogram is not always a square, but a square is a parallelogram.
Find the area of a parallelogram with base equals 15 cm and height equals 7 cm.?
Area of a parallelogram is base*height 15*7=105 105 square centimeters
Is a square or trapezoid have a special name and is a parallelogram?
Square = parallelogram and a square trapezoid = trapezoid Parallelogram = Parallelogram
Explain why a square is a parallelogram?
Because it is a 4 sided quadrilateral with with 2 pairs of parallel sides
When is a square a parallelogram?
A square is always a parallelogram. Every square is a parallelogram.
Is a parallelogram is a square?
No, a parallelogram is not necessarily square.However, by definition, a square is always a parallelogram.
