Quadrilateral ABCD~ Quadrilateral LMNO The perimeter of quadrilateral ABCD is 640. The perimeter of quadrilateral LMNO is 144. What is LM?

In a certain pentagon, the interior angles are a,b,c,d,e where a,b,c,d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

What is the value of x in the equation 6(x + 1) – 5x = 8 + 2(x – 1)?

Find the required measurements of the following trapezoids. a = 8 cm b = 16 cm h = 10 cm