Aright triangle includes one angle that measures 30º. what is the measure of the third angle? a. 30º b. 90º c. 60º d. 130º

C. 60º

Step-by-step explanation:

A triangle is called a right triangle when one of it's angle measures 90°.

We have been given the second angle as 30°.

The angles in a triangle add up to 180°.

∴ leting the third angle to be X;

X + 30° + 90° = 180°

X + 120° = 180°

X = 180° - 120°

   = 60°

answer: 180

step-by-step explanation:

12-2=10

20-2=18

10x18=180

135 is your answer

step-by-step explanation:

try 180 times three then divide that number by 4 (sides) to get your answer. im glad to : )