Use trigonometry
sin 42 = a / 21
a = 21 sin 42 = 14.05
12/1 or in simplest form 12. Hope this helps!
I believe it is c idk the question really doesn't make that much sense
Answer:
42 square centimeters
Step-by-step explanation:
The total of sides FA and AB will be half the perimeter of the rectangle, or 14 cm. Since AB is 9 cm, that means FA is 5 cm.
EF is the difference between EF and FA, so is 11 cm -5 cm = 6 cm.
FC is the same 9 cm length as AB, so we have enough information about the trapezoid to use the area formula:
A = (1/2)(b1 +b2)h
A = (1/2)(9 cm +5 cm)(6 cm) = 42 cm^2
The area of the trapezium is 42 cm^2.
Answer:lol
Step-by-step explanation:
hahaha
