Question

plzz answere me.........
do it in note book or paper Plzzzz......​

Answer 1

Answer:

We know the two angles are- 80,135

A= 80

B=135

C=?

D=?

A+B+C+D =360

80+135+C+D= 360

215 +C+D= 360

C+D= 360-215

C+D= 145

Hence,says that two angles are equal so,....

C= 72.5

D= 72.5

Answer 2

Answer:

1) 57,75,95,133.

2)72.5

Step-by-step explanation:

1) Three angles of a quadrilateral are in the ratio of 3:5:7.

Let the three angles of quadrilateral be 3x, 5x, 7x.

According to the problem it says,

Difference between the greatest angle and the smallest angle is 76 degree.

The greatest angle is 7x and the smallest angle is 3x.

So, 7x-3x= 76

     4x= 76

      x= 76/4

      x= 19

 Since x= 19 , hence the three angles are 3* 19= 57, 5*19=95, 7*19=133.

We know the sum of all four angles of a quadrilateral is 360 degree.

Let one angle be x.

So x+57+95+133=360

  x+285=360

  x=360-285

  x=75

The four angles are 57,75,95,133.  

2)Two angles of a quadrilateral are 80 and 135.

Let the other two angles be x{Since other two unknown angles are equal].

We know sum of all four angles of a quadrilateral are 360 degree.

so, 80+135+x+x=360

   215+2x=360

   2x=360-215

   2x=145

   x=72.5

Therefore other two angles are 72.5 and 72.5 respectively.