Maths / Constructions / Construction of Triangle using SAS Criteria

QUESTION
 

In the following figure if AB = AC then find angle x.

Draw the figure

Book name - TALENT & OLYMPIAD 332

page No. 142

Q. no. 18

OPTIONS
A. 

80^0

B. 

70^0

C. 

60^0

D. 

110^0

Right Option : B

EXPLANATION
Explain TypeExplanation Content
Text

because , , AB=AC rightarrow , , angle A=angle C=X^0 angle A+angle B+angle C=180^0 angle A+X+X=180^0 angle A=180^0-2X because , , , , Exterior, , angles, , is, , equal, , to, , the, , sum, , of, , opposite, , interior, , angles. 180^0-2x^0+x^0=x+40 2x=140^0 x=70^0

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