Find The Measure Of Each Exterior Angle Of A Equilateral Triangle. Therefore each exterior angle is equal to 180 60 120. For example in triangle ABC above.
C 80o. To prove certain theorems you may need to add a. An equilateral triangle is a triangle with sides of equal.
C A F 13 x 3 3x 2 55 B 75 18 Find mYDC.
100C 180o from 1 C 180o 100o. SOLUTION Step 1 Write and solve an equation to fi nd the value of x. AB C 180o. Step 2 Substitute 75 for x in 2x 5 to fi nd mJKM.