# In triangle ABC, the size of angle B is 5 times the size of angle A, and the size of angle C is 18° less than 4 times the size of angle A?

##### 1 Answer

Jan 14, 2018

#### Explanation:

Recall that the total sum of inner angles of a triangle is

Since

Then we can say

Then we can simplify and get

Then

Then we plug in to get

and