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The internal angles of a triangle add up to 180 degrees. 80 + 60 = 140 140 + x = 180 (x= the unknown angle) x = 180-140 x = 40 The unknown angle is 40 degrees
If the circumference is split into 4 arcs then the 4th arc is 360-20-140-50 = 150 degrees
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To find the area of a square, you square the length of one of its sides. In this case, if the side of the square is 38 cm, the area would be 38 cm x 38 cm = 1444 square cm. Therefore, the area of the square with a side length of 38 cm is 1444 square cm.
If x is an angle that is supplementary to the 86-degree angle, then x would measure 94 degrees. This is because supplementary angles add up to 180 degrees, so 180 degrees - 86 degrees = 94 degrees.