Question

An exteriorangle of triangle measures140ᵒand its two interioropposite angles are in the ratio 3:4. The angles of triangle are
a) 70°, 50°,60° b) 70°,40°,70° c) 60°,80°, 40° d) none of these

Answer 1

Answer:

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Answer 2

Answer:

$let \: two \: angle \: be \: 3x \: and \: 4x. \\ we \: know \: that \\ exterior \: angle \: \\ = sum \: of \: two \: interior \: opposite \: angle \\ \: opposite \: to \\ exterior \: angle \\ = > 140 = 3x + 4x \\ 7x = 140 \\ x = 20 \\ angle \: are : \\ 3x = 3 \times 20 = 60 \\ 4x = 4 \times 20 = 80 \\ \\ third \: angle \\ 180 - sum \: of \: two \: other \: angle \\ = 180 - (60 + 80) \\ 180 - 140 = 40$

Step-by-step explanation:

$(c) \: is \: correct \: option \\ \: plz \: mark \: me \: as \: brain liest \:$