Question

In a triangle ABC ∠A = 90°, ∠B = 4y°, ∠C = (3y + 6)° Find the value of y.

Answer 1

Answer:

104 / 7

Step-by-step explanation:

In a triangle ABC ∠A = 90°, ∠B = 4y°, ∠C = (3y + 6)°

sum of the angles of the triangle is 180 degree.

A . T . P

90 + 4y + 3y + 6 = 180

96 + 7y = 180

7y = 180 - 76

7y = 104

y = 104/7

Answer 2

90° + 4y + 3y+6 = 180...... [Angle-sum property of Triangle.]

so,

90° + 4y + 3y+6 = 180

==> 96 + 7y = 180.........[Adding like terms]

==> 7y = 180 - 96

==> 7y = 84

$= = > y = \frac{84}{7} \\ = = > y = \dfrac{\cancel{84}}{\cancel{7}}$

==> y = 12

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