- Question #1: In the figure below, quadrilateral ABCD has AB parallel with CD. What is the area of triangle ABD?
(a) 3
(b) 4
(c) 6
(d) 8
(e) 9
The area of triangle ABD is equal to (1/2)AB·DE, where DE is the altitude from D to AB.
AreaABD = (1/2)4·3 = 6.
- Question #2: The edges of a cube are each 4 inches long. What is the surface area, in square inches, of this cube?
(a) 66
(b) 60
(c) 76
(d) 96
(e) 65
Answer: Each face of the cube has an area of 4×4 = 16 square inches
The total surface area of the cube is (6 faces)x(16 square inches) = 96 square inches.
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