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 ?

January 4, 2022

By Eden

2 thoughts on “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 ?<br /><br /”

1. Answer:

   (c) 81°

   Step-by-step explanation:

   Given:-

   Measurements of the angles of a triangle :-

   • 8t°
   • 3t°
   • 9t°

   To find:-

   • Measure of 9t°

   Solution:-

   Since, sum of all angles of a triangle is 180°,

   Therefore,

   => 8t° + 3t° + 9t° = 180°

   => 20t° = 180°

   => t = 180/20

   => t = 9°

   So, Value of 9t° :

   => 9 × 9° = 81°

   Answer :- 81°

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2. Answer:

   c) 81°

   Explanation:

   8t+ 3t+ 9t = 180° (Sum of all the angles of a triangle is 180°)

   20t = 180°

   t = [tex]\frac{180}{20}[/tex]

   t = 9°

   2t = 2×9 = 18°

   3t = 3×9 = 27°

   9t = 9×9 = 81°

   Therefore, 9t is 81°.

   Reply