Use Pythagorean theorem. 6^2+8^2=c^2. 36+64=c^2. C=10.
Answer: D. 96
Step-by-step explanation:
1/2 (82 + 110)
1/2 (192) = 96
formula for interior angles of a polygon is 180 times the number of sides minus 2
20 a 20gon has 20 sides, 20 -2 = 18, 180*18 = 3240
sum of interior angles = 3240 degrees
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angle F = angle E
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