Question

plz solve this question​

Answer 1

Answ:er

1st fig.=80 degree, 2nd fig.=40 degree, 3rd fig.=60 degree

Step-by-step explanation:

The adjacent sides of a triangle are equal to each other

By, angle sum property ASP

Let the unknown sides of the first figure be x

= 40+60+x=180

=100+x=180

=x=180-100

=x=80

Therefore, the unknown side of the first triangle is 80 degree.

now,

The adjacent sides of a triangle are equal to each other.

so,

unknown side of 2nd triangle are 60 and 80 respectively.

let the third unknown side be x,

=60+80+x=180

=140+x=180

=x=180-140

=x=40

The last figure,

The adjacent sides of a triangle are equal to each other.

So, the unknown sides of 3rd figure are 80 and 40 respectively

=80+40+y=180

=120+y=180

=y=180-120

=y=60

Answer 2

Answer:

y-60

Step-by-step explanation:

here given that in triangle ABC,A-40,B-60

then C-80

because the sum of triangle is 180 so C-80.

Now

in triangle BCD right angle at C so Angle C- 90.

angel A=angel DBC because these are corresponding angle .so now in triangle BDC

angel B-40,angle C-90and so angel D-60 because angle A and Angle C are alternate angel.