Question

please solve this question( from class 8 ) i will very thankful to u

Answer 1

hlo mate.

here is your answer.

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angle D =50 degree
angle C=E =90 degree.
let's find the value of angle A
angle A +angle D +angle E =180 degree.
angle A +50 +90 =180
angle A +140 =180
angle A =180 -140
angle A =40 degree.

A/Q

angleEAC+angleABC-2 angleDAC

40 +angle ABC-2×DAC
40 +angleABC-2×40
40 +angleABC -80

Now, let's find the value of angle ABC

ABC
The value of -:
A=40
B=?
C=90 [given ]
A+B+C =180
40 +90 +B =180
B=180 -130
B=50 degree.

ABC=50 degree.
40 +50-80
90 -80
=>10 degree.

Therefore the correct option is option 2 [10 degree ]

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hope it helps you