In triangle abc, the size of angle b is 3 times the size of angle a, and the size of angle c is 12degrees less than 6 times the size of angle a.

Step-by-step explanation:

we know that

The sum of the interior angles in any triangle must be equal to 180 degrees

so

----> equation a

----> equation b

----> equation c

Solve the system by substitution

Substitute equation b and equation c in equation a

Solve for A

Find the measure of angle B

Find the measure of angle C

a

step-by-step explanation:

k

step-by-step explanation:

domit