Geometry math question no guessing and show work you

In an isosceles triangle , two sides are equal

so we check for option A and C

let us check for each,

option A:

1,1,3

sum of two sides > third side

but here 1+1<3

so this cannot be possible triangle

option C:

{6,6,5}

6+6 =12 >5

6+5=11>6

so it satisfies both the conditions, so option C {6,6,5} is correct

we know that

applying the law of sines

°

so

∠j=18°

∠k=29°

∠l=180-(18+29)=133°

the answer part a) is

the measure of angle k is  ≈29°

part b)  the measure of angle k could also be

(180-29)=151°

so

∠j=18°

∠k=151°

∠l=180-(18+151)=11°

the answer part b) is

the measure of angle k could also be 151°

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step-by-step explanation:

find the angular size of the equatorial radius of the earth, if the horizontal parallax of the sun