A uma distância de 40m uma torre é vista sob um ângulo de 20°, como mostra a figura. Determine a altura h da torre (sen 20° = 0,34 cos 20° = 0,94 e tg 20° = 0,36 )

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 solution of sqrt x+2-15=-3

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.