Question

prove that sum of all the angles of triangle is 180°. Also, find the angle of a triangle, if they are in
the ratio 5:6:7
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Answer 1

Answer:

angles are 50 , 60 , 70 degree

Step-by-step explanation:

an equilateral triangle each angle are equal which is 60 degree. and triangle have three angles

sum of angles = 60 + 60 + 60

= 180 degree

ratio of angles = 5:6:7

then angles are 5x , 6x , 7x

sum of angle of triangle = 180

5x + 6x + 7x = 180

18x = 180

x = 180/18

x = 10

then angles are = 5x = 5 × 10 = 50

= 6x = 6 × 10 = 60

= 7x = 7 × 10 = 70