Question

The measure of three angles of a quradrilateral is 30 degree , 70 degree and 100 degree . find out the measurement of fourth angle .

Answer 1

Answer:

Let ,

ABCD be a quadrilateral

angle A = 30°

angle B= 70°

angle C= 100°

to find

Angle D

Solution,

we know that

angle A + angle B + angle C + angle D = 360° (ASP of a quadrilateral)

30 + 70 + 100 + D = 360

200 + D = 360

D = 360 -200

D = 160°

hence the required value of angle D = 160°