Sin 49 = QR/12.38
QR = 12.38 sin 49
QR = 9.34 cm.
Answer:
333 ft^2
Step-by-step explanation:
Surface area is the sum of all the areas of the shape.
First, the area of the square in the center is simply 9x9 = 81.
The area of a triangle is (bh)/2, where b = base, and h = height
In the triangle, 9 is the base, and 14 is the height:
(9x14)/2 = 63
There are four triangles of the same area:
63 x 4 = 252
252 + 81 = 333
The answer of the question is B
The answer to your question is algebraic expressions :)
x = √(9 × 16) = √144 = 12 cm
-------------------------------------------
.
