Please someone explain this thing to me:(

Dear Student,

Example :Given the base angle,say ​angle B and the sum AB+AC of the other two sides of a triangle ABC , you are required to construct it .
Steps of Construction :

• Draw the base BC (it can be of any measurement as per the question you have to draw) and at the point B make  an angle( it may be of any angle as per the question you have to draw) and mark the point as X ,say angle XBC =( The angle which we make in the point B) .
• Take the measurement AB+AC in between rounder(compass) and taking the B as the point draw a arc to ray BX and mark the point as D .
• Join point C and point D .
• Draw a perpendicular bisector of line segment BD and mark the point as A which intersects the ray BX .
• Join point C point A .
• Then ABC is the required triangle .

Kindly read the points and try some questions related to the same example you will get the concept clearly.

Regards