Question

IN FIGURE 11.30 FIND ANGLE A
PLEASE GIVE ME STEP BY STEP EXPLANATION ​

Answer 1

Angle B of triangle ABC is 180°-120°.

• As both the angles sum up to 180°
• This is because they lie on a straight line.
• The angles are a linear pair.

Angle B of triangle ABC = 60°

Angle C of triangle C is 180°-130°

• This is too because they are linear pair
• Lie on a straight line

Angle B = 50°

Angle A = 180°-(60°+50°)

• Angle sum property of a triangle

Angle A = 180° - 110°

Angle A = 70°

Hope it helps

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