Question

The first angle of a triangle is 8tº, the second angle is 3tº, and the third angle is 9tº. What is the measure of 9tº ?


a
20º


b
180º


c
81º


d
89º

Answer 1

Answer:

c. 81°

Step-by-step explanation:

We know that, sum of all angles of a triangle = 180°

∴ => 8t + 3t + 9t = 180°

=> 20t = 180

=> t = 9

• Measure of 9t = 9 × 9

        =  81°

Therefore, answer is c) 81°

                                 

Hope this helps !