Question

GOOD AFTERNOON!♥️

Q- SET UP AN EQUATION AND THEN SOLVE .

=1) IN AN ISOSCELES TRIANGLE, THE VERTEX ANGLE IS TWICE EITHER BASE ANGLE. ( REMEMBER THAT THE SUM OF ANGS PF A TRIANGLE IS 180 DEGREE.

OPTION A -4B=180°

OPTION B -3B=180°

OPTION C -5B =180°

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Answer 1

Let, base angle be "b".

So, vertex angle= 2b

Sum of angles in a triangle= 180 degrees

There are 2 base angles and 1 vertex angle.

So, 

2b+b+b = 180

4b= 180

b=180/4

b=45 degrees.

Therefore,

b=45 degrees

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Answer 2

Answer:

HOLA MATE YOUR ANSWER-

LET THE BASE ANGELS BE= B

SUM OF ALL THE ANGLES IN TRIANGLE = 180°.

= 2B +B+B = 4B

NOW IF WE DIVIDE 180 FROM 4

=> 180/4

=45 degrees

SO , OPTION A IS TRUE ✔✔