Question

In a ||gm if, one angle is 90 degree then find the other 3 angles​

Answer 1

Answer:

Question

In a parallelogram if, one angle is 90 degrees then find the other 3 angles

concept

Here the concept of property of parallelogram is used.  

Answer

‣ Consider a parallelogram ABCD where ∠A =90 degrees.

We know that,

✞The opposite sides of a parallelogram are equal.

 so ∠C =90 degrees

✞ The angles on the same side of the transversal are supplementary, which means they add up to 180 degrees.

 so ∠A+ ∠B= 180 Degrees. Similarly ∠C+∠D =180 Degrees

  Both ∠B and ∠D are 90 Degrees.

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FACTS!

1. Number of sides = 4
3. Number of vertices = 4
5. Mutually Parallel sides = 2 (in pair)
7. Area = Base x Height
9. Perimeter = 2 (Sum of adjacent sides length)
11. Type of polygon = Quadrilateral

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Answer 2

Answer:

L A = LC by oposite angles

so angle Aand angle C=180°

Step-by-step explanation:

so angle B and Angle D =180°

angle A + angle B =180°

90+B=180°

B=180-90=90°

angle C+ angle D=180°

90+D=180°

D=180-90=90

angle a and b =180

angle C and D=180