Question

Construct a triangle ABC with the following dimensions
AB = 100mm, AC = 70 mm and angle BAC of 45°
Determine the other side and angles of the triangle​

Answer 1

Use SAS(Side angle side ) rule.
Then cosine law i.e a^2=b^2+c^2-2*b*c*COSA
We will get a=69 mm
Now we have all sides use sine law
a/sinA=b/sinB
We will get B=60(deg)
And use the law: sum of all angles of triangle is 180(deg)
We will get C=75(deg).