SOLUTION: I need help with this,
The sum of the measures of the first three interior angles of a pentagon is 345 degrees. The mesure of the fourth angle is the average of the measures of
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The sum of the measures of the first three interior angles of a pentagon is 345 degrees. The mesure of the fourth angle is the average of the measures of
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Question 364110: I need help with this,
The sum of the measures of the first three interior angles of a pentagon is 345 degrees. The mesure of the fourth angle is the average of the measures of the first three. Find the measure, in degrees, of the fifth angle. Answer by amoresroy(361) (Show Source):
You can put this solution on YOUR website! Given:
The sum of the measures of all interior angles of a pentagon is 540
345 = the sum of the measures of the first three interior angles
345/3 = the mesure of the fourth angle
= 115
Let x = the measure, in degrees, of the fifth angle
= 540 - 345 - 115
= 80
The measure of the 5th angle is 80 degrees
