Question

in triangle ABC if angleA +angleB+= 65°and angle B + angle C =140° the measure of angle A =​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

In triangle ABC

• Angle A + Angle B = 65⁰
• Angle A = 65⁰ – Angle B
• Angle B + Angle C = 140⁰
• Angle C = 140⁰ – Angle B
• Angle A + Angle B + Angle C = 180⁰

putting value of Angle A & Angle C

65⁰–Angle B + Angle B + 140⁰ – Angle B = 180⁰

205⁰ – Angle B = 180⁰

Angle B = 205⁰ – 180⁰

Angle B = 25⁰

Angle A = 65⁰ – 25⁰ = 40⁰

Angle C = 140⁰ – 25⁰ = 115⁰