Question

in triangle abc angle B 45 degree angle C 55 degree find angle a​

Answer 1

According to angle sum property,

sum of three side of a triangle = 180

in triangle abc,

∠b = 45,   (given)

∠c = 55    (given)

∠a+∠b+∠c = 180

∠a + 45 + 55 = 180

∠a = 180 - 100

∠a = 80

Answer 2

in the triangle abc angle b=45 degrees angle c is 55 degree

a+b+c=180 degrees

a+45+55=180

a+100=180

a=180-100

a=80

then angle a is 80 degrees

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