Question

10. If two angles of a triangle are 110° and 30°, then find the third angle.
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Answer 1

Answer:

let the third angel be x

110+30+x=180

=>x=180-140

=>x=40

ans=40

Answer 2

Required Answer :-

$Angle \: 1 = 110 \: \degree$

$Angle \: 2 = 30 \: \degree$

$Angle \: 3 = x \: \degree$

$Angle \: 1 + Angle \: 2 + Angle \: 3 = 180 \degree$

$( \: sum \: of \: all \: angles \: of \: Triangle \: )$

$110 \degree + 30 \degree + x \degree = 180 \degree$

$140 \degree + x \degree \: = 180 \degree$

$x \degree = 180 \degree - 140 \degree$

$x \degree = 40 \degree$

Verification :-

$110 \degree + 30 \degree + 40 \degree \: = 180 \degree$

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