9.1.1 Developing Formulas for Triangles and Quadrilaterals − Worksheet
Example 1: Find each measurement. 1. the area of the parallelogram
2. the height of the rectangle, in which A = 10 x 2 ft 2
10 cm
12 cm
3. the perimeter of a square in which A = 169 cm 2
Example 2: Find each measurement. 4. the area of the trapezoid
5. the base of the triangle, in which A = 58.5 in 2
20 m
9 m
15 m
6. b 1 of a trapezoid in which A = (48 x + 68) in
2 , h = 8 in., and b
2 = (9 x + 12) in.
Example 3: Find each measurement. 7. the area of the rhombus
8. d 2 of the kite, in which A = 187.5 m 2
15 m
25 in.
14 in.
119
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