Question

if one ane of a triangle is 80 and other two angle are in ratio 3:7 find the angle​

Answer 1

Given :-

• The one angle of a triangle is 80 .

• The other two angle are in ratio 3:7.

To Find :-

• The angle obtained .

Solution :-

We know, that sum of all angles of a triangle is 180°. (Angle sum property of a triangle)

• First angle of triangle is 80°.

The other two angle of triangle are 3x° & 4x°

3x° + 7x° + 80° = 180°

➝ 10x° = 180 - 80

➝ 10x° = 100°

➝ x = $\cancel{\dfrac{100}{10}}$

➝ x = 10

3x° = 3 × 10 = 30°

7x° = 7 × 10 = 70°

Let's Verify :-

3x° + 7x° + 80° = 180°

➝ 30° + 70° + 80° = 180°

➝ 180° = 180°

Hence, verified ✔

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Answer 2

$\huge\fcolorbox{black}{pink}{Answer:-}$

Given that,

One angle in triangle is 80°

Other two angles are in ratio 3:7

So let angles are 3x,7x

☆☆In a triangle sum of 3 angles are 180°

So,

3x + 7x +80° =180°

10x = 180°-80°

10x = 100°

x=10°

3x= 30°

7x= 70°

Therefore angles in a triangle are 30°,80°,70°

$\huge\sf\underline\pink{Know more}$

☆In a triangle 3 sides are equal call ot as equilateral triangle

☆If two sides are equal we call it as iscoceless triangle

☆In a triangle If all sides are different we call it as Scalene triangle