Exercise 34 Page 404

We want to find the measure of the missing angle in the given triangle.

To find the angle measure, we will first recall a key piece of information!

With this rule, we can write an equation connecting the measures of the angles of our triangle. 21^(∘)+ x^(∘)+ 133^(∘)=180^(∘) Let's solve the equation and find the value of x. For simplicity, we will not write the degree symbol.

The measure of the missing angle is 26^(∘).