1. To compute for the triangle's area, we must recall that for triangles,
area = bh/2, where b is the base and h is the height of the triangle.
Thus, area = (14)(9)/2 = 63 inches². Thus, the answer is D.
2. Since all sides of a squre are equal, then its area is just the square of its side.
Given that the square's area is 81 in², that means s² = 81.
Therefore, we have s = 9 inches. The answer is A.
3. To find the distance around the circular barbecue pit, we need to compute for its circumference. We can compute it by multiplying its diameter to π.
Hence, the to distance is π(2) = 3.14(2) = 6.28 m. Hence, answer is B.
4. Since area of a square is the square of its side, then given a 16-inch television screen, its area is (16 in)² = 256 in². Therefore the right answer is B.
5. To find the volume of Sheri's freezer, we need to multiply the dimensions as
V = lwh = (2 ft)(6 ft)(2 ft) = 24 ft². Thus, answer is A.
6. Recall that to calculate for the cylinder's volume, we have V = πr²h. Since the given cylinder has a diameter of 10 inches, that means its circular base has a radius of 10/2 = 5 inches.
Now, the volume will be (3.14)(5 in)²(20 in) = 1570 cubic inches. Answer is B.
7. The height of an equilateral triangle is 7 inches and base is 10 inches. Thus, the area of the triangle is (7)(10)/2 = 35 in². Therefore, answer is C.
8. Since the distance from the center to the edge of the disc is 6 cm, that means it has a radius of 6 cm. Thus, the disc's area is πr² = (3.14)(6 cm)² = 113.04 cm². Hence, the answer is B.
