the angles of a triangle are 5 (y-1)°, 3(2y-5)° and 9y°. Find y and assign the name of the triangle
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5(y-1)° + 3(2y-5)° + 9y° = 180°
5y-5 + 6y-15 + 9y = 180°
20y -20° =180°
20y = 180° +20°
y = 200°/20°
y= 10°
putting y=10° in 5(y-1)° , 3(2y-5)° & 9y°
we get 45°, 45°, & 90° respectively
hence, the triangle is right angle isosceles triangle
5y-5 + 6y-15 + 9y = 180°
20y -20° =180°
20y = 180° +20°
y = 200°/20°
y= 10°
putting y=10° in 5(y-1)° , 3(2y-5)° & 9y°
we get 45°, 45°, & 90° respectively
hence, the triangle is right angle isosceles triangle
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