Question

find ‛a’ in figure 11.17​

Answer 1

Answer:

The Correct Answer is 60 Degrees

Step-by-step explanation:

The angle sum property of a triangle says that the sum of its interior angles is equal to 180°. Whether a triangle is an acute, obtuse, or a right triangle, the sum of the angles will always be 180°. This can be represented as follows: In a triangle ABC, ∠A + ∠B + ∠C = 180°.

Therefore, the sum will be,

( a + 12 )  + a + (a - 12) = 180

3a + 12 -12 = 180

3a = 180

a = 60 Degrees