Question

The second angle of a triangle is double the first. The third angle is 40 less than the first. Find the three angles

algebra ​

Answer 1

Answer:

first angle = x = 55°

second angle = 2x = 2*55 = 110°

third angle = x-40 = 55-40 = 15°

Step-by-step explanation:

let first angle be = x

so, second angle will be = 2x

and, third angle will be = x-40

we know that, sum of interior angles is 180°

so,

x+2x+x-40 = 180°

4x-40 = 180°

4x = 180+40

4x = 220

x = 220/4

x = 55°

first angle = x = 55°

second angle = 2x = 2*55 = 110°

third angle = x-40 = 55-40 = 15°

Answer 2

Step-by-step explanation: