Question

the angle of triangle are 3x° (2x+20)° and (5x-40)° . Find the angle. hence show that the triangle is an equilateral triangle​

Answer 1

Step-by-step explanation:

USING ANGLE SUM PROPERTY :

3x+(2x+20)+(5x-40)=180

3x+2x+20+5x-40-180

10x-20=180

10x=180+20

10x=200

x=20

All the angles are:

3x=3x20=60 2x+20=2×20+20=40+20=60 5x-40-5x20-40-100-40=60

All the angles are of 60° therefore it is an equilateral triangle.

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