Question

In ΔABC if |_A + |_B = 65 and |_B+|_C = 140 find |_B​

Answer 1

Answer:

25⁰

Step-by-step explanation:

A+B=65⁰.......... (1)

B+C=140⁰

C=140⁰-B...........(2)

adding (1) and (2),

A+B+C=65⁰+140⁰-B

We know that sum of the angles of a triangle is 180⁰

so,

180⁰=205⁰-B

B=205⁰-180⁰

B=25⁰