Please help, this is for middle school, but I swear it's for high school

Si la base de un triángulo isósceles mide 70 m y el ángulo opuesto a ésta mide 58°; entonces ¿cuánto mide la altura de dicho triángulo? a) 21.87 m. b) 40.01 m. c) 43.74 m. d) 63.14 m.

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length