Question

In a triangle, If the second angle is 20% more than the first angle and the third angle is 20% less than the first angle, then find the three angles of the triangle.​

Answer 1

Let "x" be the first angle.

Then, the second angle  =  120% of x  =  1.2x

The third angle  =  80% of x  =  0.8x

We know that,

The sum of the three angles of a triangle  =  180°

x + 1.2x + 0.8x  =  180°

3x  =  180°

x  =  60°

The first angle  =  60°

The second angle  =  1.2(60)  =  72°

The third angle  =  0.8(60)  =  48°

So, the three angles of a triangle are 60°, 72° and 48°.  

Answer 2

Answer:

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