Question

find the third angle of a traingle if two of the angle of a traingle are 45 degree and 65 degree​

Answer 1

Answer :

• Third angle of a triangle is 70⁰

Given :

• if two of the angle of a triangle are 45⁰ and 65⁰

To find :

• Third angle of triangle

Solution :

• let the third angle be x

As we know that :

• sum of angle of triangle is 180⁰

Then,

⇢ 45 + 65 + x = 180

⇢ 110 + x = 180

⇢ x = 180 - 110

⇢ x = 70

Hence Third angle is 70⁰

Extra :

properties of triangle :

• A triangle has three sides, three angles and three vertices
• The sum of the three interior angle of a triangle is 180⁰

Answer 2

Question :

find the third angle of a triangle if two of the angle of a triangle are 45 degree and 65 degree .

Answer :

$\sf\pink{Given}$

• first angle is 45°

• second angle is 65°

$\sf\pink{To\:Find}$

• Third angle = ?

Explanation :

• let third angle be "x"

By angle sum property of triangle , sum of all angles of a triangle is 180°

Therefore ,

$\longrightarrow\sf{45 + 65 + x = 180}$

$\longrightarrow\sf{110 + x = 180}$

$\longrightarrow\sf{ x = 180 - 110}$

$\longrightarrow\sf{ x = 70° }$

• therefore third angle is 70°

@MissOxford