Question

please give me the solution of the question​

Answer 1

Answer:

1.(a).. Angle ADC +90° = 180. (linear pair.)

So angle ADC = 90

As we know that the sum of all the angle in a quadrilateral is 360°.

so, 70+60+90+x=360

220+x=360

x=360-220

So the value of x is 140°.

(b). We know that the sum of interior angl of quadrilateral is 360°.

So let angle ADC be y.

y+140+95+40=360

y=360-275

y=85°.

x+y=180. (linear pair)

x+85=180

x=180-85

x=95°.

So the value of x is 95°.

(c) Again we know that the sum of all the angles of quadrilateral is 360°.

In this all angles are eual.

So, x+x+x+x=360

4x=360

x=90°.

So the value of x is 90

And also we can say that it is a square.

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