Construction of a triangle given its base and base angle and sum of other two sides


 
 
Concept Explanation
 

Construction of a triangle given its base and base angle and sum of other two sides

In order to construct a triangle, when its base, sum of the other two sides and one of the base angles are given, we follow the following steps:

Steps of Construction:  Obtain the base, base angle and the sum of other two sides. Let BC be the base, dpi{100} large angle B be the base angle and x be the sum of the lengths of other two sides AB and AC of large Delta ABC.

STEP I Draw the base BC.

STEP II Draw large angle B of measure given in the question.

STEP III  From ray through B making the specified angle, cut-off line segment AX equal to x (the sum of other two sides).

STEP IV Join XC.

STEP V: From point C taking radius more than half of CX Draw arc on both side of CX.
STEP VI : From point X taking same radius as in step V Draw arc on both side of CX to intersect the arcs drawn in step V at point P and Q.
STEP VII :  Join PQ . This is the perpendicular bisector of CX meeting BX at A.
STEP VIII Join AC to obtain the required triangle ABC.

Justification: Let us now see how do we get the required triangle.

Since point A lies on the perpendicular bisector of CX.Therefore,      AX = AC

Now,     BA = BX  - AX

large Rightarrow       BA = BX - AC                                     [ large because AX = AC ]

large Rightarrow      BX = BA + AC

PROOF

.... (More Text Available, Login?)
 
Video Link - Have a look !!!
 
Language - English
 
 
 


Students / Parents Reviews [20]