Math, asked by anoushkashaju, 2 days ago

Calculate the unmarked angles in each figure:

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Answered by kuchipudipriyanka
1

Answer:

a+40+90=180

a+130=180

a=180-130

a=50

Answered by Anonymous
2

Assumption:

Let the given triangle be ∆ABC right-angled at B.

According to the question:

∠B = 90° [right angled]

∠C = 40°

As we know that the sum of all angles in a triangle is 180°

∠A = 180° - (90° + 40°)

 = 180° - 130°

 \bold{\red{= 50° (Ans)}}

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