Question

In ΔABC, < A = 30°, < C = 45° then find < B.​

Answer 1

Step-by-step explanation:

Solution

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Correct option is

A

2

Using sine rule,

sinA

a

=

sinC

c

We have, A=180−75=105

∘

∴c=

sin105

∘

3

+1

sin45

∘

=

3

+1

3

+1

2

2

2

1

=2

Answer 2

Answer:

Angle B = 105°

Step-by-step explanation:

The total angle measurement of a triangle is 180°

Angle A = 30°

Angle B = ?

Angle C = 45°

Total angle measurement = 180°

∴ Angle B = 180° - (30° + 45°)

= 180° - 75°

= 105°