The surface area of a spherical clamshell bandstand has a radius of 100 ft. What is the total surface area of the semi-hemisphere, given that: A= 4tr2 to the nearest foot?

Me find the missing dimension of a triangle height: 7 in., area: 21^2

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota

Fill in the blank 1. a rhombus is a rectangle a) always b) sometimes c) never 2. a square is a quadrilateral a) always b) sometimes c) never 3. a trapezoid is a kite a) always b) sometimes c) never 4. a quadrilateral is a kite a) always b) sometimes c) never 5. a square is a rhombus a) always b) sometimes c) never 6. a parallelogram is a rectangle a) always b) sometimes c) never