Question

if a isosceles triangle is 40 then measure of other two angles will be

Answer 1

Answer:

70

Step-by-step explanation:

x+x+40 = 180

2x = 180-40

2x = 140

x = 70

Answer 2

Answer:

The other two angles of the isosceles triangle = 70°

Step-by-step explanation:

Given :

First angle of the isosceles triangle = 40°

Sum of all angles of isosceles triangle = 180°

Note -:

(The two angle of the isosceles is equal)

To find :

The length of other two angles

Taken :

Let the other two angle be x

So , to find the other two angle of the isosceles triangle use this formula -:

$\boxed{\sf{x+x+{40}^{\circ}={180}^{\circ}}}$

Solution :

$\leadsto\bf{x+x+{40}^{\circ}={180}^{\circ}}$

$\leadsto\bf{2x+{40}^{\circ}={180}^{\circ}}$

$\leadsto\bf{2x={180}^{\circ}-{40}^{\circ}}$

$\leadsto\bf{2x={140}^{\circ}}$

$\leadsto\bf{x=\cancel{\dfrac{{140}^{\circ}}{2}}}$

$\leadsto\bf{x={70}^{\circ}}$

So , the other two angles of the triangle is 70° .

Extra information :

There are three types of triangles -:

(i) Scalene triangle = The triangle which all three side are of different length .

(ii) Isosceles triangle = The triangle whose two sides are equal and one side is different .

(iii) Equilateral triangle = The triangle whose all sides are same .