Question

find the value of x​

Answer 1

Answer:

$x = 40 \: degree.$

$sum \: of \: all \: angles \: of \: the \: triangle = 180 \: degree$

$100 + x + x = 180 \: degree$

$100 + 2x = 180 \: degree$

$2x = 180 \: degree - 100 \: degree$

$2x = 80 \: degree$

$x = 40 \: degree$

Step-by-step explanation:

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Answer 2

Answer:

$both \: the \: unknown \: sides \: are \: of \: 40 \: degree$

Step-by-step explanation:

$this \: is \: an \: Isosceles \: triangle. \: so \: two \: sides \: \\ equal \: and \: therefore \: we \: can \: take \: another \\ unknown \: side \: as \: x. \\ sum \: of \: all \: sides \: of \: triangle \: is \: 180 \: degree. \\ x + x + 100 = 180 \\ 2x + 100 = 180 \\ 2x = 180 - 100 \\ 2x = 80 \\ x = \frac{80}{2} \\ x = 40 \\ \\ so \: the \: two \: unknown \: sides \: are \: 40$