Question

26. If the two angles of a triangle is 25° and 30°
then what is the third angle

options

1)125° 2)80° 3)900* 4)180°​

Answer 1

Answer:

We know that the sum of all three angles of any triangle is 180 degree.

Step-by-step explanation:

Therefore, suppose the third angle is x.

= x+25+30=180

= x+55=180

= x= 180-55=125

Therefore, the measure of third angle of the triangle is 125 degree.

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Answer 2

Step-by-step explanation:

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$\text{\Large\underline{\bf{Question:-}}}$

:$\Longrightarrow$ ● If the two angles of a triangle is 25⁰ and 30⁰ then, what is the third angle.

$\text{\Large\underline{\bf{To\ find:-}}}$

$\sf To\ find = \begin{cases} \sf{●\ In\ this\ question\ we\ have\ to\ find\ the\ third\ angle\ of\ the\ triangle.} \end{cases}$

$\text{\Large\underline{\bf{Given:-}}}$

$\sf Given = \begin{cases} \sf{●\ First\ angle\ of\ triangle\ =\ 25⁰.} \\ \\ \sf{●\ Second\ angle\ of\ triangle\ =\ 30⁰.} \end{cases}$

$\text{\Large\underline{\bf{Solution:-}}}$

● By using angle sum property of triangle we can find the third angle.

$\text{\large\underline{\bf{Angle\ sum\ property:-}}}$

● This property states that all angles of triangle sum up and make 180⁰.

$\text{\large\underline{\bf{According\ to\ the\ question:-}}}$

● Let the third angle of the triangle be x.

● So here,

:$\Longrightarrow$ $\sf{30\ +\ 25\ +\ x\ =\ 180}$

:$\Longrightarrow$ $\sf{55\ +\ x\ =\ 180}$

:$\Longrightarrow$ $\sf{x\ =\ 180\ -\ 55}$

:$\Longrightarrow$ $\sf{x\ =\ 125⁰.}$

Hence:-

● The third angle of the triangle is 125⁰.

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